5 3/4 x 8 1/2”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• The caliber 55 new and old seem to differ only in the click spring. On the old version, the click spring is round, on the new one it is straight

• Listing ID: 4891
• Manufacturer / Brand: Bifora
• Caliber: 55 new
• Size in French Lignes: 5 3/4 x 8 1/2'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: Bifora Bishock
• Beats per hour: 18,000
• Balance Type: Screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1950
• Identification: Marked under the balance with the Bifora logo (B in a circle) and 55. Listed in the Flume K3 catalog from 1972.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-4#post-1408492
• Country: Germany
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)