Vintage Watch | Seiko 6139-7050 Speedtimer

Seiko 6139-7050 Speedtimer: Seiko 5 Sports Dial, Perfect Black, Fully Serviced

A Seiko 6139-7050 is a Japan-market Speedtimer: black dial, Seiko 5 Sports logo, orange Speedtimer script, tachymeter, day and date. On this one the dial is perfect, the crystal has no use marks, the case is in great condition, and the movement has been fully serviced.

Why is the 6139 movement special?

In 1969 three automatic chronographs arrived within months of each other. Zenith announced the El Primero in January. The Swiss Chronomatic group (Heuer, Breitling, Hamilton-Buren) put the Caliber 11 on the market around August. Seiko’s 6139 reached Japanese shops on 21 May 1969, from a Suwa internal report. It was the first chronograph with a vertical clutch, paired with a column wheel — the layout still used on high-grade chronographs. It beats at 21,600. JDM pieces are usually the 21-jewel 6139B; some export versions are 17 jewels. Power reserve is about 45 hours. There is no running seconds: the central hand is the chronograph seconds. The subdial at 6 counts 30 minutes. Day and date quick-set by pushing the crown — light for date, deeper for day. The 6138, with a 12-hour counter, followed in 1970.

Colonel William Pogue wore a gold-dial 6139 on Skylab 4 in 1973. That watch is the one collectors call the Pogue. This 7050 is the same movement family, not that dial.

The Seiko5 SpeedTimer tells you the era of the watch 

Early 6139-6000 Speedtimers put “SpeedTimer” under Seiko at 12 and a 5-shield with Sports/Water text at 9. Later cases, including the 70xx family, move the branding: Seiko 5 Sports logo at 12, orange Speedtimer script across the centre, tachymeter scale, day and date at 3. The 7050 is that later layout, Japan domestic, with a three-level black dial. The code near 6 on this one reads 7100T. Black is even, print is sharp, no spotting.

About thie Seiko 6139 7050 and its Condition

The watch case is in great condition. Crystal with no use marks. Black dial is perfect. The watch movement is fully serviced by our watch maker in Japan, the Chronograph functions and day-date are working perfectly. The watch is everyday wearable and the orange hand makes the watch looks modern.

Specification

Maker: Seiko

Model: Seiko 5 Sports Speedtimer 6139-7050

Era: 1982 Sep

Case: Stainless, about 40 mm, roughly 44 mm lug-to-lug, 18 mm lugs, great condition with very minor usage mark on the case only

Crystal: Perfect shape with no useage marks

Dial: Perfect black, Seiko 5 Sports logo, orange Speedtimer, tachymeter, day and date at 3

Movement: Automatic chronograph Caliber 6139, 21,600 bph, column wheel, vertical clutch, fully serviced by our watchmaker in Japan 

A vintage Seiko 6139-7050 with a perfect black dial and a clean crystal is the later Seiko 5 Sports Speedtimer — same 1969 automatic chronograph, different face from the Pogue.

Shown on a black strap. NATO or any Kyoto Series colour on request.