Brand: Seiko

Model: 5 Sports Speed-Timer Automatic Chronograph ref. 6139-7020 (JDM Model) circa April of 1971

Case: Solid stainless steel case with screw-down back is approximately 41mm excluding the original unsigned crown and pushers

Bracelet: Rare original 19mm Seiko 5 Sports stainless steel bracelet with signed fold-over clasp and removable links; will fit wrist sizes up to slightly over 7" (optional clasp extension can be installed to accommodate larger wrist sizes)

Movement: Seiko cal. 6139A self-winding automatic chronograph (21 jewels) with quick-set day (two languages) and quick-set date; 21,600 BPH; Suwa Seikosha Japan

Features: Stunning original luminous matte black dial with red accents and 15-minute blue regatta totalizer at 6 o'clock; original white and black luminous hands; original orange chronograph register hands; blacked out day-date display at 3 o'clock with red Sunday text (can choose between Japanese "Kanji" or English days of the week); black internal rotating countdown bezel; unpolished 41mm stainless steel case with mineral glass crystal; rare original Seiko 5 Sports JDM bracelet; in-house Seiko 6139 column-wheel chronograph movement (serviced)

Condition: Superb original condition overall with minor honest wear consistent with age and careful use; unpolished solid stainless steel case is thick and sharp with the original finishes throughout; crisp screw-down caseback remains clearly legible; gorgeous original matte black dial with crisp printing, vibrant colors, and all luminous material in tact; excellent original hands with all luminous material in tact and matching; original orange chronograph register hands remain bright and vibrant; beautiful original Seiko 5 Sports bracelet matches the condition of the watch and even comes with the original Japanese sizing sticker on the inside of the clasp

Other: This fantastic vintage JDM Seiko Speed-Timer is the definition of value - How did Seiko pack so many features into one watch while retaining such a balanced and appealing design aesthetic? We love the blue 15-minute regatta sub-register, day-date display, and internal rotating countdown bezel against the clean matte black dial with a pop of red color. Seiko opted for orange chronograph hands on this model for increased legibility and it all just works so well. How cool is the Japanese "Kanji" day display? Especially on Sunday when it turns to red... This particular Speed-Timer comes in collector-grade condition on its rare original Seiko 5 Sports bracelet and is ready to pair with your Japanese sports car (i.e. a Honda S2000 in Berlina Black). For peace of mind, the Seiko 6139A movement has just been completely overhauled by our watchmaker with new gaskets installed at the time of service. Speaking of the 6139 movement, it was quite possibly the very first automatic chronograph movement to come to market commercially (May of 1969). The Zenith El Primero and Heuer cal. 11 movements also debuted that year. You can read more about this controversial topic from our friends at HODINKEE and OnTheDash. Regardless of which movement actually came first, the Seiko 6139 is a steal in the marketplace today compared to comparable watches from Heuer and Zenith.