Seiko 6138, 6139, Oscillating weight, no: 500521
Tax included.
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Used SEIKO original part in very good condition.
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Seiko part number: 500521
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Fits: 6138 A/B, 6139 A/B
Technical data: SEIKO 6138A
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21 jewels, automatic wind, chronograph, 60 s, 30 min, 12 h counter, day-date. -
S: = 27.0 mm. -
H: = 8.0 mm. -
N: = 21.600 A/h. -
Power reserve: 45 h.
Versions:
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6138A: 21 jewels. -
6138B: 21 jewels, modified switch mechanism. -
6139A: 21 jewels, without 12 h counter. -
6139B: 17 jewels, without 12 h counter, modified switch mechanism.