18”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Crown and ratchet wheel screws with left-hand thread
• Yoke also functions as yoke spring
• AS 233 = same movement with different bridge shape
• AS 597 = Savonnette (hunter) version of the movement, but with a different setting lever spring

 

• Listing ID: 301
• Manufacturer / Brand: AS
• Caliber: 630
• Size: 18'''
• Shape: Round
• Winding: Manual (Crown)
• Hand Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date & Day: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Presumably around 1928
• Identification: Dial side marked ASSA. Listed in the 1928 Ebauches SA catalog
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-59#post-8383735
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)