SEIKO ASTRON HAB003J1 GPS SOLAR DUAL-TIME CHRONOGRAPH MEN WATCH

The Seiko Astron HAB003J1 is the black-and-gold reference in the new GPS Solar Dual-Time Chronograph range, and the one that trades the titanium bracelet for a black extra-strength silicone strap. That swap changes the whole character. Where the bracelet models read as travel hardware, this one reads as sport — gold-tone plating on part of the titanium bezel, with matching gold-coloured indexes and hands against a black textured dial.

Underneath it is the same new Calibre 5X63: the first Astron movement to run its chronograph out to 24 hours in 1/20-second increments, with split-time capability, and the first to put the second time zone on a 24-hour sub-dial. The case measures 43.4mm across and 12.4mm thick — slimmer than the outgoing generation — and takes Seiko's quick-change strap system, so the silicone comes off at the press of a button with no tools involved.

At a Glance

• BrandSeiko
• CollectionAstron GPS Solar
• MovementCalibre 5X63 GPS Solar
• Case Size43.4mm
• DialBlack, Textured
• AccentsYellow Gold-Tone
• Case MaterialTitanium (Super-Hard Coating)
• GlassSapphire (Super-Clear Coating)
• FunctionsDual Time + 24-Hour Chronograph
• Water Resistance100m (10 BAR)
• StrapBlack Extra-Strength Silicone
• Power ReserveApprox. 6 Months

Why You'll Love It

• Black and gold on silicone is the sportiest execution in the range. The gold-tone bezel plating and dial furniture give it warmth without the formality that a full metal bracelet brings.
• A 24-hour chronograph. Most stopwatches cap out at 12 hours, which means anything longer has to be tracked in your head. This one measures a full day in one go, with split times along the way.
• It sets itself. The watch connects to the GPS network to adjust its time and time zone, with a high-speed time zone adjustment and automatic daylight saving correction on top.
• Light alone runs it — approximately six months from a full charge, with a power save mode of around two years. No battery to replace.
• Extra-strength silicone is built for wear that a leather strap would not survive: humidity, sweat, and rinsing under a tap afterwards. In Singapore that matters more than it does in most markets.
• The quick-change system means one press of a button swaps the strap. Seiko's compatible silicone straps come in white and black, so the same watch can shift register in seconds.
• At 12.4mm, this is the slimmest case the Astron chronograph has worn, with a two-piece octagonal bezel designed to sit the weight low for better balance.
• Perpetual calendar to 2100 and a world time function covering 38 time zones — the date and day never need correcting, and the whole map is on the watch.

Perfect For

• Frequent Flyers
• Active Wear
• Humid Climates
• Long-Duration Timing
• Black & Gold Styling
• Strap Swappers
• Technical Watch Collectors
• Milestone Gift for Him

Key Features

• Calibre 5X63 GPS Solar movement — the newest GPS Solar calibre in the Astron collection, combining dual-time capability with a 24-hour chronograph. Stated accuracy is ±15 seconds per month without a GPS signal, at temperatures between 5°C and 35°C.
• Chronograph up to 24 hours in 1/20-second increments — the 1/20-second counter sits at 9 o'clock, and the 24-hour counter (hours and minutes) runs at 6 o'clock during chronograph operation. Split-time capability lets you record an intermediate reading without stopping the count.
• Dual time on a 24-hour display — the second time zone is read in hours and minutes on a 24-hour sub-dial, so there is no separate AM/PM indicator to interpret. The main hands can also be set manually to a different zone.
• Titanium bezel with super-hard coating, partially plated in yellow gold-colour — the gold runs on the inner bezel ring and is picked up again by the indexes and hands, so the warm tone reads as a deliberate line through the design rather than a single highlight.
• Black textured dial with a geometric pattern behind three horizontally arranged sub-dials, laid out symmetrically across the dial.
• GPS time and time zone adjustment — with high-speed time zone adjustment, automatic daylight saving adjustment, a time transfer function to swap main dial and sub-dial readings, and a signal reception result indication.
• World time function covering 38 time zones, plus a perpetual calendar correct to the year 2100 and a power reserve indicator on the dial.
• Black extra-strength silicone strap — reinforced silicone built for active wear, with the resilience to handle sweat, humidity and a rinse under fresh water.
• Quick-change strap system — a button release on the case lets you remove and fit straps without tools. Seiko's reinforced silicone straps in white and black (RA01B14WT, RA01B14BK) are compatible and sold separately.
• Titanium case with super-hard coating — lighter than stainless steel, with a surface treatment that raises hardness against everyday scuffing.
• Sapphire crystal with super-clear coating — the coating cuts reflections, and sapphire rates 9 on the Mohs hardness scale.
• LumiBrite on hands and markers, date and day-of-the-week displays, magnetic resistance of 4,800 A/m and 100-metre water resistance.

Technical Specifications

The Seiko Astron HAB003J1 is a 43.4mm GPS Solar dual-time chronograph powered by the new Calibre 5X63, with approximately six months of operation from a full charge and a power save mode of around two years. The titanium case carries a super-hard coating and measures 12.4mm thick, with a two-piece octagonal titanium bezel partially plated in yellow gold-colour and a quick-change strap system. It features a black textured dial with gold-coloured indexes and hands, three horizontally arranged sub-dials, sapphire crystal with super-clear coating, LumiBrite on hands and markers, a 24-hour chronograph in 1/20-second increments with split time, dual time on a 24-hour sub-dial, world time for 38 time zones, perpetual calendar to 2100, a power reserve indicator, date and day displays, a black extra-strength silicone strap, and 100-metre water resistance.

Best Matched With

• Black Polo
• Technical Outerwear
• Dark Denim
• Charcoal Chinos
• Black Field Jacket
• Tan Leather Accessories
• Weekend Sportswear

Frequently Asked Questions

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