Fernando, hola.
https://thespringbar.com/blogs/guides/the-seiko-6139-600x-collectors-guide/
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Fig. 1
Fig. 2
Fig. 3
Fig. 4
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Seiko 6139B[/SIZE]
Features
automatic chronograph, 60s, 30min, pillar wheel
no manual wind
day: quickset by pushing the crown deeper, 2 languages
date: quickset by pushing the crown less deep
Data
12''', Dm= 27.0mm, Do= 27.4mm
H= 7.2mm
(dial spacer +0.2mm)
17/21 jewels
f = 21600 A/h
power-reserve 45h
Balance staff Seiko 315611
Stem Seiko 354617 / Seiko 357612
(normal/divers)
Mainspring / battery
Seiko 401616
Hands
1.50 x 0.90 x 0.26 / 0.26mm
Comments about the data[/TD]
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Remarks
1972-1979
sophisticated excenter self-winding mechanism with just one gear stage (Fig.4)
like 6139A, only minor modifications of switching mechanism (dial side)
family/generations:
* ) quickset, turning crown (else pushing)
**) day in 2 languages
manual wind, 21600 A/h:
6100A: -
6102A: date
6110A: like 6100A, Railroad Watch
automatic, 21600 A/h:
6105A: date*
6105B: date*, hack feature
6106A: day, date, hack feature, 2 rotor screws
6106B: day, date, hack feature
6106C: day**, date, hack feature
6109A: day, date, smaller rotor
6117A: date*, GMT 24h
6117B: date*, GMT 24h, hack feature
6118A: date*
6119A: day, date, 2 rotor screws
6119B: day, date
6119C: day**, date
chronograph, 21600 A/h:
6138A: hour counter, day*/**, date*
6138B: same, modified switching mechanism
6138A: day**, date
6139B: same, modified switching mechanism
automatic, 36000 A/h:
6145A: date, Grand Seiko
6146A: day, date, Grand Seiko
6155A: date, GS Special
6156A: day, date, GS Special
6159A: date*, Diver 300
6159B: date*, hack feature, Diver 600
6185A: GS Veri Fine Adjusted
6185B: dito, hack feature
6186A: day, date, Unruhstop, GS Veri Fine Adjusted
Example, year: signature; shock device
1973: Seiko Time Corp., Seiko, Japan, 17 Jewels; Diashock[/TD]
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