19 1/2”’ | Stopwatch | Manual Wind | Swiss Lever | Sweeping Seconds | Central Minute Counter

Remarks:

• Stopwatch with column wheel
• Crown: winding and start/stop second, pusher on the right: zero setting
• Movement family:
  • 7720: Minute counter decentralized
  • 7721: Central minute counter
  • 7722: Rattrapante (flyback), minute counter decentralized
  • 7723: Rattrapante (flyback), central minute counter
• The 7720/7721 is available with 1, 2 or 3 functions (1 F, 2 F, 3 F), the 7722/7723 with 2 or 3 functions. It is not clear exactly which ones these are. 1 F does not appear to have a column wheel.
• All calibers of the movement family under the same caliber designation also with 36,000 instead of 18,000 bph

 

• Listing ID: 330
• Manufacturer / Brand: Valjoux
• Caliber: 7721
• Size: 19 1/2'''
• Shape: Round
• Winding: Manual (Crown)
• Hand Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date & Day: None
• Other Functions: Stopwatch
• Jewels: 7
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: KIF Ultraflex
• Beats per hour: 18,000
• Balance Type: Glucydur?
• Power Reserve: Unknown
• Production Period: Around 1976
• Identification: Marked with the Valjoux logo and 7721 on the plate next to the balance. Original data sheet from 1976 is available. Listed in the addendum to the 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-59#post-8358156
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)