Longines 25.173

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  • Serial no: 5 454 511 (aprox: 1938).
  • Flat hairspring.

Data: Longines 25.173

  • 15 jewels, manual winding. indirect sub second.
  • Size: 8 x 11.5'''  17.8 x 26.55 mm.
  • H: = 4.0 mm.
  • N: = 18.000 A/h.
  • Power reserve: 43 h.
  • Mainsping: 1.60 x 10.0 x 0.10 x 360 mm.

Versions:

  • 25.17, 9L:             Bimetallic balance, Breguet hairspring.
  • 25.173:                 Monometallic balance, flat hairspring.
  • 25.17ABC, 9LT:     Monometallic balance, flat hairspring.