{"product_id":"seiko-prospex-speedtimer-hbc003j-countdown-timer-core-shop-exclusive-japanese-wristwatch","title":"Seiko Prospex Speedtimer HBC003J Countdown Timer Wristwatch","description":"\u003cp style=\"text-align: left;\"\u003eThe Seiko Prospex Speedtimer HBC003J brings the name \"Speedtimer\" back to its mechanical origins — a watch built around the specific functional demands of motorsport timekeeping, now realised with a countdown timer complication that is both practically useful and visually central to the design. The complication is a countdown-graduated inner rotating ring, operated by the crown at 4 o'clock: turn it to set a countdown duration, and the seconds hand sweeps toward zero against the graduated scale. The application Seiko describes is tyre change timing and pre-race countdowns at motorsport events, but the mechanism works for any countdown scenario where a mechanical reminder is more useful than a digital one. The seconds hand carries an orange accent — a vivid, high-contrast colour that tracks against the countdown graduations at a glance and references the warm amber gauges of classic racing cockpits. The dial colour itself echoes that classic car aesthetic: a muted, vintage-referencing tone that recalls the instrument panels of GT racers from the 1960s and 70s. Caliber 6R55, 72-hour power reserve. Curved sapphire crystal with inner anti-reflective coating. Fine-pitch stainless steel bracelet that conforms closely to the wrist. Dia-Shield case. 39.5mm diameter, 12.0mm slim for a sports automatic. Screw caseback. Core Shop exclusive. Releasing September 2026. Made in Japan.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003e*Pre-Order! Estimated release and shipment from September 2026.*\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountdown Timer Inner Ring — Mechanical Motorsport Complication\u003c\/strong\u003e: The 4 o'clock crown operates a countdown-graduated inner rotating ring — a mechanical complication that tracks elapsed time against a preset countdown, without batteries or digital displays. Calibrated for motorsport pit stop timing and race start countdowns, but usable in any context where a visible, tactile countdown is useful. The ring is bidirectional and can be set to any duration within its range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrange Accent Seconds Hand — Cockpit-Gauge Legibility\u003c\/strong\u003e: The seconds hand carries an orange accent that makes it immediately trackable against the graduated countdown scale, even in bright sunlight or motion. The orange references the warm analogue gauge colours of classic GT cockpits from the Speedtimer's era of reference — a period colour choice that doubles as a functional legibility tool.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassic Car Dial — Visual Heritage of Motorsport\u003c\/strong\u003e: The dial colour recalls the instrument panel tones of GT racing cars from the 1960s and 70s — muted, warm, and deliberately analogue in character. A dial that looks at home on a wrist trackside or at a concours event.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaliber 6R55 — 72-Hour Power Reserve, 12.0mm Slim\u003c\/strong\u003e: 24 jewels, approximately 72 hours of power reserve, automatic with hand-winding, hacking seconds. The 12.0mm case thickness is notably slim for a sports automatic, making the HBC003J comfortable under a sleeve and wearable in formal contexts without feeling oversized. Curved sapphire crystal with inner AR coating. Dia-Shield scratch resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-Pitch Stainless Steel Bracelet — Core Shop Exclusive\u003c\/strong\u003e: The fine-pitch bracelet is described by Seiko as fitting closely to wrist contours, reducing the gap between links for a more integrated, skin-close feel. One-push triple fold clasp. Maximum wrist circumference 205mm — generous range. Available exclusively through Seiko Global Brand Core Shops. Released September 2026.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWatch Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSeiko Prospex Speedtimer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eHBC003J\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMovement\u003c\/td\u003e\n\u003ctd\u003eAutomatic + Manual Winding (Caliber 6R55)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJewels\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Reserve\u003c\/td\u003e\n\u003ctd\u003e~72 hours (fully wound)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+25 \/ -15 sec per day\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComplication\u003c\/td\u003e\n\u003ctd\u003eCountdown Timer Inner Rotating Ring (4 o'clock crown)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel (Dia-Shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eCurved Sapphire (Inner Anti-Reflective Coating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Size\u003c\/td\u003e\n\u003ctd\u003e39.5mm x 44.5mm, 12.0mm thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e154g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLume\u003c\/td\u003e\n\u003ctd\u003eLumibrite (Hands \u0026amp; Indices)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCaseback\u003c\/td\u003e\n\u003ctd\u003eScrew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBand Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel (Fine-Pitch, One-Push Triple Fold)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Wrist Size\u003c\/td\u003e\n\u003ctd\u003e205mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003e200m (20ATM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnti-Magnetic\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistribution\u003c\/td\u003e\n\u003ctd\u003eSeiko Global Brand Core Shop Exclusive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelease Date\u003c\/td\u003e\n\u003ctd\u003eSeptember 2026\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct File\u003c\/strong\u003e\u003cbr\u003eBrand: \u003ca href=\"https:\/\/thejapanesefactory.com\/collections\/seiko\"\u003eSeiko\u003c\/a\u003e\u003cbr\u003eProduct: \u003ca href=\"https:\/\/thejapanesefactory.com\/collections\/wristwatch\"\u003eWristwatch\u003c\/a\u003e\u003cbr\u003eMovement: \u003ca href=\"https:\/\/thejapanesefactory.com\/collections\/automatic-movement\"\u003eAutomatic\u003c\/a\u003e\u003cbr\u003eDisplay: \u003ca href=\"https:\/\/thejapanesefactory.com\/collections\/analog-display\"\u003eAnalog\u003c\/a\u003e\u003c\/p\u003e","brand":"Seiko","offers":[{"title":"Default Title","offer_id":48269031801062,"sku":null,"price":175700.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0702\/8119\/9846\/files\/HBC003J.png?v=1788334400","url":"https:\/\/thejapanesefactory.com\/products\/seiko-prospex-speedtimer-hbc003j-countdown-timer-core-shop-exclusive-japanese-wristwatch","provider":"The Japanese Factory","version":"1.0","type":"link"}