5 3/4 x 6 3/4”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• In principle, the AS 1978 is a 1977 with a rounded edge on the left and right instead of a straight edge
• Differences between AS 1978 and AS 1978-2:
  Apart from the number of jewels (21 vs. 17) none recognizable. The three slits on the crown and ratchet wheel screws are not present on all 1978-2s, so they are not a distinguishing feature

 

• Listing ID: 3398
• Manufacturer / Brand: AS
• Caliber: 1978
• Size: 5 3/4 x 6 3/4'''
• Shape: Form
• Winding: Manual (Crown)
• Hand Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date & Day: None
• 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: Unknown
• Production Period: Unknown, probably around 1975
• Identification: Marked under the balance with the AS logo and 1978
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-25#post-3596296
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)