Seiko 6139B, Minute recording runner w. heart, no: 902612

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  Used SEIKO original part in perfect condition. Picture shows the actual part.

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  Part no: 902612

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  Fits cal: 6139B

Technical data: SEIKO 6139B

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  17 jewels, automatic wind, chronograph, 60 s, 30 min counter, day-date.
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  S: = 27.0 mm.
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  H: = 8.0 mm.
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  N: = 21.600 A/h.
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  Power reserve: 45 h.

Versions:

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  6138A: 21 jewels.
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  6138B: 21 jewels, modified switch mechanism.
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  6139A: 21 jewels, without 12 h counter.
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  6139B: 17 jewels, without 12 h counter, modified switch mechanism.