Dear Buyer, Dial , hands , case, case back , bracelet are aftermarket. 'This watch contains aftermarket customisations without permission from the brand. This could impact the watch value and might void manufacturer warranties. The brand might refuse servicing and repairs to watches modified by unlicensed watchmakers. This listing features the iconic Seiko Speedtimer 6139-6030 Automatic Chronograph Watch, widely admired by collectors for its rugged construction, unique “Coke” tachymeter bezel, and historical significance as one of the earliest automatic chronographs in the world. Technical & Cosmetic Details: • Brand: Seiko • Model: Speedtimer • Reference Number: 6139-6030 • Movement: Automatic, Seiko Calibre 6139B – 17 jewels • Case Material: Stainless steel, original • Case Back: Original with Japan J engravings • Dial: Aftermarket, designed in the original Speedtimer style with day-date (Kanji + English) window • Hands & Bezel: Aftermarket, faithful to original design • Bracelet: Aftermarket Seiko 5 Sports signed steel bracelet in excellent condition • Crown & Pushers: Original • Crystal: Acrylic, very good condition • Case Size: Approx. 41mm excluding crown • Bracelet Fit: Up to approx. 20 cm wrist Condition & Performance: • The watch has been recently serviced and is functioning smoothly. • Chronograph starts, stops, and resets properly. • Timekeeping is excellent for a vintage piece; Timegrapher test results (included in photos) show a strong amplitude, minimal beat error, and a rate of +1s/day. • The overall cosmetic condition is superb, with a sharp brushed case finish and a vivid tachymeter bezel. Important Notes: • The dial, bezel, hands, and bracelet are aftermarket replacements crafted in accordance with the original Seiko Speedtimer design. These modifications are not authorized by the manufacturer and may affect any brand warranty. • As with all vintage mechanical watches, this piece should be gently shaken for 1–2 minutes before use to ensure sufficient power reserve. • Water resistance is not guaranteed due to the watch’s age. Packaging & Shipping: • The watch will be securely packaged for shipment. • Detailed photos and a video will be taken prior to dispatch for transparency. • Fast and insured international shipping will be provided via FedEx or UPS. • Any customs duties, VAT, import taxes, or related charges are the buyer’s responsibility. ⸻ This Seiko 6139-6032 “Coke” is a fantastic opportunity for vintage chronograph enthusiasts to own a well-performing and visually striking Speedtimer. A true conversation starter from the golden era of Seiko watchmaking.