6 3/4 x 11”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Visually identical on both sides to AS 525 from the Classification Horlogère of 1936. 525 and 557 possibly differ only by a minimally altered setting lever spring
• The setting lever spring on the movement shown is broken

 

• Listing ID: 3710
• Manufacturer / Brand: AS
• Caliber: 557
• Size: 6 3/4 x 11'''
• Shape: Form
• Winding: Manual (Crown)
• Hand Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date & Day: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1936
• Identification: Dial side marked with AS 557.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-20#post-3134674
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)