Omega 20'''NN, Winding stem, DCN: 947

Omega 20'''NN, Winding stem, DCN: 947

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  • DCN no: 947
  • Thread: 2.20 mm.
  • Fits cal: 20''' NN. (negative winding mechanism).
  • A: = 128
  • B: = -
  • C: = 230
  • D: = 220
  • F: = 1342