Optima 28

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7 3/4”’ | Hand Wind | Swiss Lever | No Seconds

 

  • Listing ID: 5266
  • Manufacturer / Brand: Optima
  • Caliber: 28
  • Size: 7 3/4'''
  • Shape: Round
  • Winding: Manual (Crown)
  • Hand Setting: Crown
  • Seconds Hand: None
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date & Day: None
  • Jewels: 16
  • Setting Lever Screw/Pin Position: Left
  • Balance Position: Bottom (120 - 240°)
  • Shock Protection: None
  • Beats per hour: 18,000
  • Balance Type: Bimetallic screw balance with Breguet hairspring
  • Power Reserve: Unknown
  • Production Period: Unknown, probably around 1936
  • Identification: Movement marked with Optima. Listed in the Classification Horlogère from 1936.
  • External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-62#post-8798319
  • Country: Switzerland
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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