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

• Listing ID: 1452
• Manufacturer / Brand: Felsa / Alpina
• Caliber: Felsa 146 = Alpina 637
• Size in French Lignes: 7 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• 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: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1928
• Identification: Movement marked with the Alpina logo and 637. Listed in the Ebauches SA catalog of 1928, but with a different bridge shape.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-45#post-6112111
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)