{"product_id":"citizen-nk0030-51e-tsuyosa-mechanical-unisex-watch","title":"CITIZEN NK0030-51E TSUYOSA MECHANICAL UNISEX WATCH","description":"\u003c!--\n  CITY CHAIN SINGAPORE — SHOPIFY PRODUCT DESCRIPTION (cc-pdp)\n  CITIZEN NK0030-51E TSUYOSA MECHANICAL MEN WATCH\n\n  BUILT AGAINST: Citizen Singapore's spec sheet\n  https:\/\/citizen.com.sg\/product\/nk0030-51e\/ — plus Citizen's OWN\n  official US and UK product pages for this exact SKU, which carry\n  identical descriptive copy and are the strongest sources available\n  for this build.\n\n  PAGE TITLE (Shopify SEO title field):\n  Citizen NK0030-51E Tsuyosa 60 Mini Black Guilloché 37mm | City Chain\n\n  META DESCRIPTION (Shopify SEO description field):\n  Citizen NK0030-51E Tsuyosa 60: 37mm black sunray guilloché dial, Calibre 8310, 60-hour reserve, sapphire, integrated five-link bracelet.\n\n  ============================================================\n  CONFIRMED: CITY CHAIN'S 51E PAGE IS SHOWING THE WRONG PRODUCT COPY.\n  This was flagged as a suspicion on the NK0030-51X build; it is now\n  confirmed. The page at\n  citychain.com.sg\/products\/citizen-nk0030-51e-tsuyosa-mechanical-men-watch\n  contains copy that opens \"The NK0030-51X is the green-dial edition\n  of the Tsuyosa\" and describes the green dial throughout, including\n  the line \"Also available in black (NK0030-51E)\" — i.e. the black\n  SKU's own page tells customers the black version is available\n  elsewhere.\n\n  Practical effect: anyone landing on City Chain's black-dial product\n  page right now is reading a description of the green watch. This\n  build supplies correct black-dial copy. RECOMMEND FIXING THE LIVE\n  PAGE REGARDLESS of whether this cc-pdp version is used.\n  ============================================================\n\n  DIAL: BLACK — HIGH CONFIDENCE, NO COLOUR AMBIGUITY THIS TIME.\n  Unusually well-corroborated after the run of colour corrections in\n  this project. Citizen's OWN official US and UK product pages both\n  describe a \"finely machined, sunray black dial.\" Notebookcheck,\n  Wristbear, StrapSeeker, StarBuy, Borsheims, Sai Creations and\n  Tidewater Diamond all independently say black. No source dissents.\n  No photography check needed for the colour itself.\n\n  NOTE ON \"SUNRAY\" vs \"GUILLOCHÉ\" — NOT A CONFLICT. Citizen's own\n  official copy calls it a \"finely machined, sunray black dial.\"\n  Notebookcheck, Wristbear and StrapSeeker call it a guilloché dial.\n  These describe the same surface: a machined, engine-turned pattern\n  radiating from the centre, which produces a sunray light effect.\n  Wristbear's launch coverage and Notebookcheck both place this SKU\n  explicitly in the \"guilloché-dial references\" of the Tsuyosa 60\n  line. Both terms are used below.\n\n  FROM CITIZEN SINGAPORE \/ THE TSUYOSA 60 FAMILY'S CONFIRMED SPEC:\n  Caliber 8310 · Automatic · 60-hour power reserve · Stainless Steel\n  bracelet · Water Resistant 50m · Thickness 11.5mm · Case Size 37mm ·\n  Stainless Steel case · Sapphire Glass (anti-reflective) ·\n  Date Display · Hacking seconds and hand-winding.\n\n  (Citizen SG's own page returned only partial data — category tags\n  and a dual price — same as its 51X sibling page. The spec above is\n  confirmed by Citizen's own US\/UK official pages and multiple\n  retailers, and matches the 51X build exactly.)\n\n  CONFIRMED ACROSS MULTIPLE INDEPENDENT SOURCES (Citizen US official,\n  Citizen UK official, Notebookcheck, Wristbear, StrapSeeker,\n  StarBuy, Watch Club, Borsheims):\n  - Black sunray\/guilloché dial, finely machined, with applied metal\n    indices and a MAGNIFIED date window at 3 o'clock.\n  - 37mm silver-tone stainless steel case, 11.5mm thick.\n  - Seamlessly INTEGRATED five-link bracelet with NO VISIBLE LUGS,\n    closing on a fold-over clasp with push buttons (StarBuy is most\n    specific on the clasp).\n  - Anti-reflective sapphire crystal.\n  - Exhibition\/transparent caseback showing the Calibre 8310\n    (StrapSeeker, and consistent with the 51X sibling).\n  - 50m water resistance.\n  - 1970s-inspired integrated-bracelet design language (StrapSeeker).\n\n  TWO GENUINELY GOOD POSITIONING INSIGHTS FROM THE SOURCES, worth\n  keeping in the copy:\n  - Wristbear: guilloché can become visually busy on a bright dial,\n    but black keeps it controlled — \"you notice the pattern when\n    light catches the dial, not from the other side of the room.\"\n    This is the sharpest articulation of why the black version exists\n    alongside the mint green 51X, and it's used (paraphrased) below.\n  - StarBuy: the sunray black dial \"photographs as plain black and\n    reveals itself in person.\" Useful expectation-setting for online\n    buyers who may find product photography underwhelming — also\n    paraphrased below.\n\n  GENDER FRAMING — WORTH A DECISION. City Chain's SKU title says\n  \"MEN WATCH,\" and this build keeps that. But Borsheims lists this\n  exact reference as a WOMEN'S watch, and StrapSeeker and Watch Club\n  both describe it as UNISEX, on the strength of the 37mm case. Given\n  37mm genuinely sits in unisex territory, City Chain may be\n  narrowing its own addressable market with a men's-only framing. The\n  copy below is written to work for either audience — no gendered\n  styling language — so the page can be re-categorised without a\n  rewrite if City Chain wants to list it as unisex.\n\n  PRICE: Citizen SG's own page shows the familiar dual-price glitch\n  ($773.90 and $795.70) — identical figures to the 51X sibling page,\n  consistent with the site-wide glitch documented earlier in this\n  project. City Chain's own copy (on the mis-filed page) references\n  $730 and states there is \"no premium for the colour\" between the\n  black and green versions. Citizen UK lists £399. Confirm City\n  Chain's live price before publishing.\n\n  VERIFY BEFORE PUBLISH:\n  1. FIX THE MIS-FILED CITY CHAIN PAGE — see the boxed note above.\n     This is the priority item and is independent of this build.\n  2. PRICE — see note above.\n  3. GENDER CATEGORISATION — see note above; a business decision\n     rather than a factual error.\n  4. WARRANTY TERM. No SKU-specific confirmation beyond the standard\n     3-year City Chain figure. (Note: StarBuy advertises a 5-year\n     Citizen Australia warranty — a regional program, not City\n     Chain's terms.)\n\n  Accent colour: a neutral graphite (#4A4A4A) — matching the black\n  dial's restrained character, and deliberately distinct from the\n  mint accent used on the 51X sibling so the two pages read as\n  different products at a glance.\n--\u003e\n\n\u003cstyle\u003e\n  .cc-pdp { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1a1a1a; line-height: 1.7; }\n  .cc-pdp *, .cc-pdp *::before, .cc-pdp *::after { box-sizing: border-box; }\n  .cc-section { margin: 32px 0; padding: 0; }\n  .cc-section + .cc-section { border-top: 1px solid #e8e8e8; padding-top: 28px; }\n  .cc-pdp h2 { font-size: 11px !important; font-weight: 600 !important; letter-spacing: 0.14em !important; text-transform: uppercase !important; color: #4A4A4A !important; margin: 0 0 14px 0 !important; padding: 0 !important; border: none !important; }\n  .cc-pdp p { font-size: 14.5px; color: #555; margin: 0 0 12px 0; }\n  .cc-glance { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; list-style: none; padding: 0; margin: 0; }\n  @media (min-width: 600px) { .cc-glance { grid-template-columns: repeat(3, 1fr); } }\n  .cc-glance li { background: #f2f2f2; border-radius: 6px; padding: 12px 14px; font-size: 13.5px; color: #555; margin: 0; }\n  .cc-glance li strong { display: block; font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #2a2a2a; margin-bottom: 3px; }\n  .cc-benefits { list-style: none; padding: 0; margin: 0; }\n  .cc-benefits li { position: relative; padding-left: 18px; font-size: 14.5px; color: #555; margin: 0 0 10px 0; line-height: 1.6; }\n  .cc-benefits li::before { content: ''; position: absolute; left: 0; top: 9px; width: 7px; height: 7px; border-radius: 50%; background: #4A4A4A; }\n  .cc-tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }\n  .cc-tags li { background: #fff; border: 1px solid #e8e8e8; border-radius: 20px; padding: 7px 16px; font-size: 13px; color: #555; margin: 0; }\n  .cc-tags--dark li { background: #2a2a2a; border-color: #2a2a2a; color: #fff; }\n  .cc-spec-summary { background: #f2f2f2; border-radius: 6px; padding: 20px 22px; font-size: 14px; color: #555; line-height: 1.75; margin: 0 0 20px 0; }\n  .cc-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 8px; }\n  .cc-spec-table caption { text-align: left; font-size: 14px; font-weight: 600; color: #2a2a2a; padding: 16px 0 8px 0; }\n  .cc-spec-table tr { border-bottom: 1px solid #e8e8e8; }\n  .cc-spec-table td { padding: 10px 0; font-size: 13.5px; vertical-align: top; }\n  .cc-spec-table td:first-child { color: #555; width: 42%; padding-right: 12px; }\n  .cc-spec-table td:last-child { color: #1a1a1a; font-weight: 500; }\n  .cc-faq { border-top: 1px solid #e8e8e8; }\n  .cc-faq-item { border-bottom: 1px solid #e8e8e8; padding: 16px 0; }\n  .cc-faq-q { font-size: 14.5px; font-weight: 600; color: #2a2a2a; margin: 0 0 8px 0; }\n  .cc-faq-a { font-size: 14px; color: #555; line-height: 1.7; margin: 0; }\n  .cc-trust { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; list-style: none; padding: 0; margin: 0; }\n  @media (min-width: 600px) { .cc-trust { grid-template-columns: repeat(4, 1fr); } }\n  .cc-trust li { text-align: center; padding: 20px 10px; background: #fff; border: 1px solid #e8e8e8; border-radius: 6px; margin: 0; }\n  .cc-trust li strong { display: block; font-size: 13.5px; color: #2a2a2a; margin-bottom: 4px; }\n  .cc-trust li span { font-size: 12px; color: #555; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"cc-pdp\"\u003e\n\n  \u003c!-- PRODUCT OVERVIEW --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eCitizen NK0030-51E\u003c\/strong\u003e is the black-dial edition of the \u003cstrong\u003eTsuyosa 60\u003c\/strong\u003e — Citizen's upgraded integrated-bracelet automatic, in a compact \u003cstrong\u003e37mm\u003c\/strong\u003e case. The dial is finely machined with a \u003cstrong\u003eguilloché texture and sunray finish\u003c\/strong\u003e, so light travels outward from the centre as the wrist turns, lifting the dial from near-solid black in shadow to a soft charcoal sheen in daylight.\u003c\/p\u003e\n    \u003cp\u003eBlack is the restrained choice here, and deliberately so. Guilloché texture can become visually busy against a bright dial — against black it stays controlled, so you notice the pattern when light catches it rather than from across the room. It's a dial that photographs as plain black and reveals itself in person.\u003c\/p\u003e\n    \u003cp\u003eInside is the in-house \u003cstrong\u003eCalibre 8310\u003c\/strong\u003e with a \u003cstrong\u003e60-hour power reserve\u003c\/strong\u003e, \u003cstrong\u003ehacking seconds\u003c\/strong\u003e and \u003cstrong\u003ehand-winding\u003c\/strong\u003e — visible through the \u003cstrong\u003eexhibition caseback\u003c\/strong\u003e. An \u003cstrong\u003eanti-reflective sapphire crystal\u003c\/strong\u003e covers a \u003cstrong\u003emagnified date window\u003c\/strong\u003e at 3 o'clock, and the seamlessly \u003cstrong\u003eintegrated five-link bracelet\u003c\/strong\u003e flows straight out of the case with no visible lugs, closing on a fold-over clasp with push buttons. Water resistant to \u003cstrong\u003e50 metres\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- AT A GLANCE --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003eAt a Glance\u003c\/h2\u003e\n    \u003cul class=\"cc-glance\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003eCitizen\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCollection\u003c\/strong\u003eTsuyosa 60\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMovement\u003c\/strong\u003eCalibre 8310 Automatic\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePower Reserve\u003c\/strong\u003e60 Hours\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCase Size\u003c\/strong\u003e37mm\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e11.5mm\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDial\u003c\/strong\u003eBlack, Sunray Guilloché\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eGlass\u003c\/strong\u003eSapphire, Anti-Reflective\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDate\u003c\/strong\u003eMagnified, 3 O'Clock\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCaseback\u003c\/strong\u003eExhibition\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eBracelet\u003c\/strong\u003eIntegrated Five-Link\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWater Resistance\u003c\/strong\u003e50m\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY YOU'LL LOVE IT --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003eWhy You'll Love It\u003c\/h2\u003e\n    \u003cul class=\"cc-benefits\"\u003e\n      \u003cli\u003eThe new Calibre 8310 delivers a 60-hour power reserve — half again as long as the previous generation's 40 hours, so it comfortably survives a weekend off the wrist without stopping.\u003c\/li\u003e\n      \u003cli\u003eThe black sunray guilloché dial is the sleeper feature: it reads as plain black in photographs and reveals its machined texture in person, shifting from near-solid black in shadow to a soft charcoal sheen in daylight.\u003c\/li\u003e\n      \u003cli\u003eBlack keeps the guilloché pattern controlled. On a bright dial the texture can become busy — here it stays restrained, showing itself when light catches the surface rather than announcing itself from across the room.\u003c\/li\u003e\n      \u003cli\u003eHacking seconds lets you stop the seconds hand to set the time precisely, and hand-winding means you can top up the reserve directly rather than waiting for wrist motion.\u003c\/li\u003e\n      \u003cli\u003eAt 37mm and 11.5mm thin, this is one of the few genuinely compact integrated-bracelet watches available — most of the category arrives oversized, and most Tsuyosa references sit at 40mm.\u003c\/li\u003e\n      \u003cli\u003eThe five-link bracelet is seamlessly integrated with no visible lugs, flowing straight out of the case — the detail that makes this design language work.\u003c\/li\u003e\n      \u003cli\u003eAnti-reflective sapphire crystal offers scratch resistance mineral glass can't match, with a magnified date window for genuine legibility.\u003c\/li\u003e\n      \u003cli\u003eNothing was given up to make it smaller — same sapphire crystal, same 60-hour automatic movement, same seamless bracelet as the 40mm version.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- PERFECT FOR --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003ePerfect For\u003c\/h2\u003e\n    \u003cul class=\"cc-tags\"\u003e\n      \u003cli\u003eMechanical Watch Enthusiasts\u003c\/li\u003e\n      \u003cli\u003eIntegrated Bracelet Fans\u003c\/li\u003e\n      \u003cli\u003eSmaller Wrists \u0026amp; Compact Sizing\u003c\/li\u003e\n      \u003cli\u003eUnderstated Everyday Style\u003c\/li\u003e\n      \u003cli\u003eOffice \u0026amp; Smart-Casual\u003c\/li\u003e\n      \u003cli\u003eFirst Automatic Watch\u003c\/li\u003e\n      \u003cli\u003e1970s Sport-Luxury Design\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- KEY FEATURES --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003eKey Features\u003c\/h2\u003e\n    \u003cul class=\"cc-benefits\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCalibre 8310 in-house automatic\u003c\/strong\u003e — 60-hour power reserve, hacking seconds, and hand-winding capability.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eBlack sunray guilloché dial\u003c\/strong\u003e — finely machined, with light radiating outward from the centre.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eApplied metal indices\u003c\/strong\u003e — sharp, catching the same light as the dial texture.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMagnified date window\u003c\/strong\u003e — at 3 o'clock.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAnti-reflective sapphire crystal\u003c\/strong\u003e — scratch resistance beyond what mineral glass offers.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eExhibition caseback\u003c\/strong\u003e — displaying the Calibre 8310 movement.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e37mm silver-tone stainless steel case\u003c\/strong\u003e — 11.5mm thin.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSeamlessly integrated five-link bracelet\u003c\/strong\u003e — no visible lugs, fold-over clasp with push buttons.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e50-metre water resistance (5 BAR)\u003c\/strong\u003e — rated for handwashing, rain and brief splashes.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- TECHNICAL SPECIFICATIONS --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n    \u003cp class=\"cc-spec-summary\"\u003eThe Citizen NK0030-51E is a 37mm automatic watch from the Tsuyosa 60 generation, powered by the in-house Calibre 8310 with a 60-hour power reserve, hacking seconds and hand-winding. The silver-tone stainless steel case measures 11.5mm thick with an anti-reflective sapphire crystal, a magnified date window at 3 o'clock and an exhibition caseback, water resistant to 50 metres. The finely machined black sunray guilloché dial carries applied metal indices. It's finished on a seamlessly integrated five-link stainless steel bracelet with a fold-over clasp and push buttons.\u003c\/p\u003e\n\n    \u003ctable class=\"cc-spec-table\"\u003e\n      \u003ccaption\u003eCase \u0026amp; Build\u003c\/caption\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eModel Number\u003c\/td\u003e\n\u003ctd\u003eNK0030-51E\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCollection\u003c\/td\u003e\n\u003ctd\u003eTsuyosa 60\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCase Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel, Silver-Tone\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCase Diameter\u003c\/td\u003e\n\u003ctd\u003e37mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCase Thickness\u003c\/td\u003e\n\u003ctd\u003e11.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGlass\u003c\/td\u003e\n\u003ctd\u003eSapphire Crystal, Anti-Reflective\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCaseback\u003c\/td\u003e\n\u003ctd\u003eExhibition, Transparent\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003e50 Metres (5 BAR)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ctable class=\"cc-spec-table\"\u003e\n      \u003ccaption\u003eDial\u003c\/caption\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eFinely Machined Sunray Guilloché\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMarkers\u003c\/td\u003e\n\u003ctd\u003eApplied Metal Indices\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eHours, Minutes, Seconds, Date (Magnified, 3 O'Clock)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ctable class=\"cc-spec-table\"\u003e\n      \u003ccaption\u003eBracelet\u003c\/caption\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless Steel, Integrated\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eStyle\u003c\/td\u003e\n\u003ctd\u003eFive-Link, No Visible Lugs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eClasp\u003c\/td\u003e\n\u003ctd\u003eFold-Over with Push Buttons\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ctable class=\"cc-spec-table\"\u003e\n      \u003ccaption\u003eMovement \u0026amp; Power\u003c\/caption\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCalibre\u003c\/td\u003e\n\u003ctd\u003eCitizen 8310 (In-House)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eAutomatic, Hacking Seconds, Hand-Winding\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003ePower Reserve\u003c\/td\u003e\n\u003ctd\u003e60 Hours\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- BEST MATCHED WITH --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003eBest Matched With\u003c\/h2\u003e\n    \u003cul class=\"cc-tags cc-tags--dark\"\u003e\n      \u003cli\u003eCharcoal Suit\u003c\/li\u003e\n      \u003cli\u003eWhite Oxford Shirt\u003c\/li\u003e\n      \u003cli\u003eNavy Blazer\u003c\/li\u003e\n      \u003cli\u003eGrey Wool Trousers\u003c\/li\u003e\n      \u003cli\u003eSmart-Casual Chinos\u003c\/li\u003e\n      \u003cli\u003eMonochrome Styling\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FAQ --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n    \u003cdiv class=\"cc-faq\"\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eWhat makes this a \"Tsuyosa 60\"?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eThe 60 refers to the 60-hour power reserve of the in-house Calibre 8310, up from 40 hours in the previous Tsuyosa generation. The caliber also adds hacking seconds and hand-winding, and the collection moves to a guilloché-textured dial and an upgraded five-link bracelet.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eIs the dial plain black or textured?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eTextured. The dial is finely machined with a guilloché pattern and sunray finish, so light radiates outward from the centre as the watch moves — shifting from near-solid black in shadow to a softer charcoal sheen in daylight. It often photographs as plain black and shows its texture properly in person.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eHow does this compare to the mint green version?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eSame case, same Calibre 8310, same 60-hour reserve and bracelet — the difference is dial colour and how the texture reads. On the mint green NK0030-51X the guilloché pattern is immediately visible; on this black dial it's more restrained, showing itself when light catches the surface. Black is the quieter, more versatile of the two.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eWhat is hacking seconds?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003ePulling the crown out to the time-setting position stops the seconds hand completely, letting you set the time to the exact second. Many automatic watches let the seconds hand keep running while you set the time; this one stops it, for precision.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eCan I wind it by hand?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eYes. Alongside automatic winding from wrist motion, Calibre 8310 supports hand-winding via the crown — useful for topping up the reserve after the watch has been sitting unworn.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eHow long does the power reserve last?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003e60 hours when fully wound — comfortably more than two days, so the watch will still be running if you leave it off over a weekend. Regular daily wear keeps it continuously wound.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eWill 37mm fit my wrist?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003e37mm sits at the compact end of the modern range and suits smaller and medium wrists particularly well. Most integrated-bracelet sports watches arrive oversized, and most Tsuyosa references are 40mm — this is one of the few genuinely compact options, and at 11.5mm thin it slips easily under a cuff.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eCan I see the movement?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eYes. The exhibition caseback displays the in-house Calibre 8310 automatic movement while it's running.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eCan I swim with this watch?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eNo. With 50-metre (5 BAR) water resistance it's rated for handwashing, rain and brief accidental splashes, but it isn't intended for swimming, showering or diving.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eDoes a mechanical watch need servicing?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eYes. Unlike a quartz watch, an automatic has moving parts and lubricants that wear over time. Citizen recommends periodic servicing to keep timekeeping and water resistance within spec. Any City Chain outlet can arrange this — bring your warranty card.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eIs the bracelet adjustable?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eYes. The integrated five-link bracelet can be resized by adding or removing links, and closes with a fold-over clasp and push buttons. City Chain offers complimentary bracelet sizing at any outlet — bring your warranty book along for the service.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"cc-faq-item\"\u003e\n        \u003cp class=\"cc-faq-q\"\u003eWhat warranty does this watch come with?\u003c\/p\u003e\n        \u003cp class=\"cc-faq-a\"\u003eThe NK0030-51E comes with a 3-year warranty when purchased from City Chain Singapore, an authorised Citizen retailer. Keep your warranty card and proof of purchase — both are required when submitting the watch for service at any City Chain outlet.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- WHY BUY FROM CITY CHAIN --\u003e\n  \u003cdiv class=\"cc-section\"\u003e\n    \u003ch2\u003eWhy Buy from City Chain Singapore\u003c\/h2\u003e\n    \u003cul class=\"cc-trust\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAuthorised Retailer\u003c\/strong\u003e \u003cspan\u003e100% genuine Citizen product\u003c\/span\u003e\n\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e3-Year Warranty\u003c\/strong\u003e \u003cspan\u003eCovered on every purchase\u003c\/span\u003e\n\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFree Shipping\u003c\/strong\u003e \u003cspan\u003eAll orders within Singapore\u003c\/span\u003e\n\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eBracelet Adjustment\u003c\/strong\u003e \u003cspan\u003eSize it in-store\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"CITIZEN","offers":[{"title":"Default Title","offer_id":49585082761431,"sku":"NK0030-51E","price":730.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/2451\/7272\/files\/Citizen_NK0030-51E.png?v=1786677494","url":"https:\/\/www.citychain.com.sg\/products\/citizen-nk0030-51e-tsuyosa-mechanical-unisex-watch","provider":"City Chain Singapore","version":"1.0","type":"link"}