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Seiko 6138, 6139, Oscillating weight, no: 500521

Seiko 6138, 6139, Oscillating weight, no: 500521

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  • Used SEIKO original part in very good condition.
  • Seiko part number: 500521
  • Fits: 6138 A/B, 6139 A/B


Technical data: SEIKO 6138A

  • 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:

  • 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.