Rare Vintage Seiko Chronograph Japanese Military issued JASDF monopusher 458990

Description

INCREDIBLY RARE Seiko Monopusher Chronograph Ref. 45899 – 5719A – 1960s JASDF Japanese Air Self defence Force Issued. Military-Issued w/ Medal – WorkingUp for sale is an exceptionally rare and historically significant Seiko Monopusher Chronograph, reference 458990, issued in the 1960s to the Japanese Air Self-Defense Force (JASDF). This is not a civilian model — it was military-issued only, and this example features the original JASDF engraved caseback and issued serial number, making it a true collector’s item.Key Specifications: • Brand: Seiko • Model: Monopusher Chronograph • Reference: 458990 • Movement: Seiko 5719A, manual wind • Chronograph: Single-button (monopusher) – starts, stops, and resets correctly • Case Material: Stainless Steel • Bezel: smooth steel tachymeter bezel (engraved) • Dial: slate grey ghost dial variant — original and unmodified • Hands: Original, with some light signs of age and patina • Crystal: minor marks consistent with age. • Case Diameter: ~38mm excluding crown/pusher • Caseback: JASDF logo + engraved military-issued serial number + Japanese inscription • Strap: Comes on a strap with original Japanese imperial military medal/pin attached • Extras: Includes extra bracelet (Seiko) • Functionality: Running well and chronograph functions are working as intendedCondition Report: • Case: good vintage condition, shows minor signs of wear and age-appropriate marks • Dial & Hands: Dial is clean with light patina; hands show some aging (see photos), adding to the vintage charm • Movement: Manually wound 5719A movement is running and keeping time within acceptable vintage tolerances ( can be +- 1m every 24h) • Chronograph: Monopusher starts, stops, and resets properly — a rare feature from Seiko’s early chronograph development, pusher has been worn with scratches dents as seen but it functions as it should. Notes: • This watch was never sold to the public — it was produced specifically for Japan’s military aviation personnel. • The attached military medal and engraved caseback further validate its military provenance. • A must-have for collectors of vintage Seiko, military watches, or Olympic-era chronographs.I have witnessed only a handful of these and was lucky enough to get this one. The few I have seen are with seasoned military watch collectors so not usually seen on marketplaces. Watch only (no box or papers), but includes extra bracelet and military medal strap. These rarely appear for sale, especially in working condition with original engravings intact.Ships worldwide with tracking. I have plenty of sales and references across most social media platforms. So buy with complete ease. Ask me any questions you may have. Sales are final so please look into pictures and details, ask if any concerns. Thanks for looking and have a great day. ⸻

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