Seiko 6139B Caliber Vintage Watch Movement

Seiko Caliber 6139B

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Seiko 6139B Caliber Vintage Watch Movement

Brand Seiko
Caliber Number 6139B
Movement Type Automatic
Jewels 17
Vibrations Per Hour
21,600 bph
Diameter 27mm
Thickness 7.1mm
Shock System Diashock
Crown Location 3:00
Functions Hours, minutes, central chronograph seconds, 30 minute counter, day, date
Country of Manufacture Japan
Known Models 6139-6005 (add more in the comments below)

The crown adjusts the day/day by pushing in (lightly for day, harder for date). The crown also controls an internal rotating bezel. 30 minute subdial is at 6:00 and there is a central chronograph seconds hand.

There are different variations of this movement, including Seiko caliber 6139A, 6138A, and 6138B.

From a post on watchuseek by sempervivens:

…so Seiko cal. 6139A was produced from 1969 until 1971 and the switch from Seiko cal. 6139A to Seiko cal. 6139B took place in 1971, which lasted until 1978.

Concerning Seiko cal. 6138, everything probably happened one year later :
production of 6138A started in 1970, the switch to 6138B took place in 1972, and production lasted until 1979.

Seiko 6139B Caliber Vintage Watch Movement

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Maxime
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Maxime

hi, you guys don’t happen to rebuild those movement for selling right?

Nick
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Nick

I have a 6139 A missing one of the hammer springs! what ithe pisition of 586611 and odf the 575610?

Nick
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Nick

I have a 6139 A missing one of the hammer springs! where is the position of 586611 near 2 pm or near 4 pm?….to buy one of the hammer spring and I need help!

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