8 3/4”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Date fast setting by alternating 21:30-24:00
• Movement family:
  • AS 1780: Hand winding
  • AS 1781: Hand winding, date
  • AS 1782: Automatic
  • AS 1783: Automatic, date

• Listing ID: 3369
• Manufacturer / Brand: AS
• Caliber: 1781
• 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: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 21
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 21,600
• Balance Type: Nickel
• Power Reserve: Approx. 38 hours
• Production Period: Unknown, probably around 1970
• Identification: Marked AS 1780/83 under the balance. Listed in the 1972 Flume K3 catalog.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-20#post-3155675
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)