Tavannes 19’’’ 3.B Ref 931

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19”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

  • The crown wheel is missing on the movement shown
  • Negative winding (referred to by the inscription “U. S. PAT. 24 MAY 1904” on the barrel bridge -> see patent US760647)
  • Screw-set jewels (Chatons)
  • Swan-neck fine regulator

 

  • Listing ID: 3048
  • Manufacturer / Brand: Tavannes
  • Caliber: 19’’’ 3.B Ref 931
  • Size in French Lignes: 19'''
  • Shape: Round
  • Winding: Manual (Crown)
  • Hands Setting: Crown
  • Seconds Hand: Small seconds
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date, Day, Month...: None
  • Jewels: 15
  • Setting Lever Screw/Pin Position: None (Negative Winding)
  • Balance Position: Right (0 - 120°)
  • 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: Listed in the Classification Horlogère of 1936, but shown there is the Savonnette (hunter) version Ref. 930 of this Lépine (open face) movement.
  • External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-30#post-3948616
  • Country: Switzerland
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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