10 1/2”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Shown in the Ebauches SA catalog with setting lever spring. This movement here has none, hence the unofficial designation “old”. AS often had the same caliber number, first without and later with setting lever spring.
• The AS 373 with setting lever spring is presented here: AS 373
• In this case, the model number 373 in the Swiss Official Gazette of Commerce matches the manufacturer’s caliber designation. This is usually not the case.

• Listing ID: 1380
• Manufacturer / Brand: AS
• Caliber: 373 old
• Size in French Lignes: 10 1/2'''
• Size range mm largest diameter: 22 - 31 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: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably from around 1920 to at least 1928
• Identification: Registered in the Swiss Official Gazette of Commerce in 1920 as AS model No. 373. Listed in the Ebauches SA catalog of 1928.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-46#post-6304149
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)