Seiko
1969 Seiko Automatic Chronograph (Ref. 6139-6020) "Pulsations"
In the 1960s and 1970s, Seiko produced a variety of affordable mechanical chronograph watches. This particular one is unofficially known as the 'Doctor's Watch', or the Seiko "Pulsations", which is a chronograph designed for doctors to measure resting heart rate with its inner rotating 'Base 10' numeric system bezel. Not only can the Pulsations be used to measure resting heart rate, but this watch would also make for a great output timer for a number of engineering or measurement needs.
Most intriguingly, the "Pulsations" watch also happens to share the same 6139 movement as the famed Seiko "Pogue", arguably the first automatic chronograph ever made.
SPECS
| Stock # | PT61396020 | |
| Brand | Seiko | |
| Style | Chronograph | |
| Model | 6139-6020 | |
| Serial | 903705 | |
| Size | Men's | |
| Material | Stainless Steel | |
| Dial | Silver | |
| Millimeters | 40 | |
| Bracelet | Seiko Bracelet |
CASE & BRACELET
This attractive square cushion case shows honest use and retains full and even lugs, with minimal evidence of being previously polished. All original caseback engravings remain clear and visible. The black and silver inner rotating "Base 10 Pulsations" bezel is in stunning condition, with all markings fully intact. The case retains its original crown and pushers. Comes on its original stainless steel bracelet.
DIAL & HANDS
The attractive putty-colored dial is in excellent vintage condition with no signs of age. All lume plots are a creamy white and fully intact when inspected under U.V. light, showing no signs of age. The original cigarette-style hands have aged a shade darker than the dial. The orange sub-dial sweep-seconds hand and chronograph hand contrast the dial perfectly and are in excellent condition. The day and date wheels are in excellent condition, as are all hour indices, day window, and date window, showing very minimal signs of age.
ACCESSORIES
None. The watch is running and functioning correctly, though the service history is unknown. A movement service can be purchased upon request.