CITIZEN NK0030-51X TSUYOSA MECHANICAL MEN WATCH

Citizen NK0030-51X – Tsuyosa Mechanical Automatic Watch for Men

The NK0030-51X is the green-dial edition of the Tsuyosa — Citizen's next-generation upgrade to the Tsuyosa automatic collection. Same new in-house Calibre 8310 movement with 60 hours of power reserve as the black-dial 51E, but with a green sunray guilloché-style dial that gives the watch a warmer, more contemporary personality. Green is the strongest colour trend in men's watchmaking right now, and the guilloché concentric pattern adds texture and depth that a flat green sunray can't match. The movement is visually upgraded too — rhodium-plated bridges, openworked rotor, blue-coloured screws, and striped decoration on the main bridge, all visible through the exhibition caseback. The bracelet is a 5-link Jubilee-style design with a concealed butterfly clasp — a significant step up from the standard Tsuyosa's 3-link bracelet. Sapphire crystal with date magnifier, luminous hands and indices, 50m water resistance. No battery — self-winding with manual winding capability.

Key Features:

• Movement: Calibre 8310 in-house automatic — 21 jewels, 21,600 vph (3Hz), 60 hours power reserve, hacking seconds, manual winding capable. Rhodium-plated with openworked rotor, blue screws, and striped bridge decoration
• Dial: Green sunray with guilloché-style concentric pattern, applied silver-tone markers with luminous fill, luminous hands, date display at 3 o'clock with magnifier
• Case Size: 40mm diameter, 11.7mm thick — stainless steel, silver-tone, brushed surfaces with polished accents
• Crown: 4 o'clock position for a slimmer wrist profile and improved comfort
• Water Resistance: 50M — suitable for everyday wear and light splashing
• Crystal: Sapphire glass with date magnifier
• Caseback: Exhibition — displays the upgraded Calibre 8310 movement
• Bracelet: 5-link Jubilee-style integrated stainless steel with concealed butterfly clasp, brushed outer links and polished centre links
• Additional: Shock protection, luminous hands and indices

Why Choose the Citizen NK0030-51X?

If you want the Tsuyosa's upgraded movement and bracelet but find the black 51E too neutral, the green dial is the answer. The guilloché pattern is more visible on a green surface than on black — the concentric texture catches and plays with light in a way that makes the dial dynamic at any angle. At the same $730 price as the black version, there's no premium for the colour — just a different personality. The green-on-steel combination pairs well with earth tones, navy, grey, and olive, making it one of the most versatile coloured-dial options available. Also available in black (NK0030-51E) and gold-tone with white dial (NK0032-56A).

Extra $15 OFF with min. $200 spend
Use Code: FORYOU15

Extra $30 OFF with min. $400 spend
Use Code: FORYOU30

Caliber No.: 8310
Movement: Mechanical
Strap: Stainless Steel
Water Resistant: Water Resistant 50m
Thickness: 11.7mm
Case Size: 40.0mm
Case: Stainless Steel
Glass: Sapphire Glass
21 jewels
Automatic
Date Display
Frequency : 21,600 vph
Running time of approx. 60 hours (when fully wound)
Shock protection

Delivery within Singapore | Order by 11AM
(Checkout options may vary depending on minimum order requirements)

• Free Standard Delivery (3 business days)
• Free Next Day Delivery
• Express Delivery at $30 (order by 2PM)
• Click & Collect (ready in 2–3 business days)

Weekend & Public Holiday Orders
Orders placed during this time will be processed on the next business day.

For online purchase, you can have bracelet or leather strap adjustments done at any City Chain store. Please bring along your warranty book for the service.