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

Remarks:

• Movement family:
  • FHF / ST 69: 18,000 bph, setting lever screw, no seconds, no date
  • FHF / ST 69-21: 21,600 bph, setting lever screw, no seconds, no date
  • FHF / ST 69N: 21,600 bph, setting lever pin, 3/4 plate, no seconds, no date
  • FHF / ST 69N M6: 21,600 bph, setting lever pin, 3/4 plate, no seconds, date (date module 15.3 x 17.8 mm)
  • FHF / ST 69N M8: 21,600 bph, setting lever pin, 3/4 plate, no seconds, date (round date module 19.4 mm)
  • FHF / ST 691: 21,600 bph, setting lever screw, 3/4 plate, sweeping seconds, no date
  • FHF / ST 691N: 21,600 bph, setting lever pin, 3/4 plate, sweeping seconds, no date
  • FHF / ST 691N M6: 21,600 bph, setting lever pin, 3/4 plate, sweeping seconds, date (date module 15.3 x 17.8 mm)
  • FHF / ST 691N M8: 21,600 bph, setting lever pin, 3/4 plate, sweeping seconds, date (round date module 19.4 mm)
  • FHF / ST 692: 21,600 bph, setting lever pin, no 3/4 plate, no seconds, no date
  • FHF / ST 692 M6: 21,600 bph, setting lever pin, no 3/4 plate, no seconds, date (date module 15.3 x 17.8 mm)
  • FHF / ST 692 M8: 21,600 bph, setting lever pin, no 3/4 plate, no seconds, date (round date module 19.4 mm)

• Listing ID: 3336
• Manufacturer / Brand: FHF / ST
• Caliber: FHF 691N M8 / ST 691N M8
• Size in French Lignes: 8 3/4''' (base movement 6 3/4 x 8''')
• 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: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: Ruby-Shock
• Beats per hour: 21,600
• Balance Type: Nickel
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1978
• Identification: FHF/ST logo, 691N and M8 marked under balance wheel. Original data sheet from 1978 available.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-26#post-3633471
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)