The Seiko 6139 automatic chronograph – a historical movement in its own right, like this excellent 1969 Seiko 6139A-6010 Japanese Domestic Market (JDM)-only SpeedTimer "Deep Blue," w/its original Seiko 5 Sports SpeedTimer bracelet here – was one of the first automatic chronographs created and ranks with Zenith’s El Primero and Heuer’s Calibre 11.
Back in the 1970’s, Heuer and Zenith had taken hold of the entire sports watch industry by racing to become the first to produce an automatic chronograph. It has been widely debated who won, but in the background of this skirmish, Seiko quietly created one theirs at the same time, beating the Swiss at their own game – the 6139.
We all know Omega was the first watch on the moon, mostly because Omega won’t let us forget (ever). However, the first automatic chronograph in space was the more humble and less publicized Seiko 6139-6005, named after US astronaut Colonel William Pogue, who wore his on the 1973 Skylab 4 mission-despite not obtaining NASA authorization–to time shuttle engine burns due to his familiarity with the watch and trust in its capabilities…trusting the lives of himself and fellow astronauts to the reliability of his Seiko. When asked about his 6139, Pogue confirmed the story and later donated it for sale in a 2008 charity auction.
The 6139 was the first chronograph to have a vertical clutch, a feature considered by many to be one of the hallmarks of a superior automatic chronograph movement. The 6139 features a single register chronograph allowing time to be measured in increments of 30 minutes, and also features an automatic column wheel timing control, vertical coupling mechanism, and is an integrated chronograph – the first in the world – which means the entire 6139 movement was designed and built to be a chronograph, vice being an automatic movement with a mere timing module added.
Of note, this Seiko 6139 variant received its nickname by regularly being worn by Bruce Lee - yes, that Bruce Lee. Unfortunately, this bit of research appeared to have escaped the watchful eyes of the producers of Quinten Tarantino's "Once Upon A Time...In Hollywood," and Bruce wasn't wearing his in the movie, but we digress.
With this movement, Seiko set the standard, which was followed by the Swiss watch industries 20 years later. The same movement configuration was adopted by Rolex when it made its own in-house movement for the Daytona in 2000, 30 years after Seiko released the caliber 6139 and 6138.
This 6139 includes its original Seiko 5 Sports stainless-steel bracelet, nylon NATO strap, springbar tool, and Pelican travel case.
1969 Seiko 6139A-6010 SpeedTimer "Deep Blue" Chronograph, w/Original Bracelet
DIAL: Original deep blue SpeedTimer and proof-signed dial, with vibrant red font - lume is in exquisite condition and continues to shine. Day/date complication, with Kanji Japanese/English variants, at 3 o’clock position works as designed. Hands are original Seiko NOS ones, and the original hands - with heavy patina - will be included.
CASE: Original 39.5mm x 43.5mm stainless steel case; crown is recessed. Original caseback has "water proof" nomenclature. Case lines remain sharp, with no evidence of machine polish.
CRYSTAL: Hardlex crystal, no scratches or blemishes.
BAND: This 6139 comes with its original "Seiko 5 Sports" signed stainless-steel "railroad" bracelet, which will fit an approximately 7.5 inch wrist. This 6139 also comes with a dark blue and red ZULU strap – a great sporty compliment to the colors and inherent vintage nature of this Seiko 6139 chronograph.
MOVEMENT: Original Seiko 6139A 21-jewel automatic movement, manufactured in September 1969.
CROWN: Original recessed unsigned stainless steel crown.
CHRONOGRAPH PUSHERS: Chronograph pushers depress with a satisfying click, no stick, and snap back as designed to zero with no issue.