8 3/4”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• In the Classification Horlogère of 1936, the AM 623 is listed as a variant of the 621. According to the Classification, the dial sides of the 621 and 623 are identical; the movements differ only in the different bridge shapes
• There is also an AM 623 Predecessor, which has a slightly shorter setting lever spring

• Listing ID: 4899
• Manufacturer / Brand: AM
• Caliber: 623
• Size in French Lignes: 8 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: Probably around 1928
• Identification: Listed in the Ebauches SA catalog from 1928.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-4#post-1402275
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)