11 1/2”’ | Automatic | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Rotor placed out of center
• Kif-Duofix combined settings for escape wheel on bridge side
• Movement family:
  • Helvetia 846 / AS 1739: no date
  • Helvetia 847 / AS 1740: date

• Listing ID: 5901
• Manufacturer / Brand: Helvetia / AS
• Caliber: Helvetia 847 = AS 1740
• Size in French Lignes: 11 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 25
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Glucydur
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1969
• Country: Switzerland
• Identification: Marked with Helvetia logo and 847 under balance wheel. Listed in the Engelkemper catalog from 1969.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-67#post-9526261