12 1/2”’ | Automatic | Swiss Lever | Indirect Sweeping Seconds | Power Reserve Indicator 36 h |

Remarks:

• 1962 Junghans renamed its movements, J was replaced by 6, so the J80/12 became the 680.75
• Movement family:
  • Manual winding, small seconds
    • Junghans J80, 680.70: 7/11/13/15/16 jewels, no shock protection, with or without separate cock for escape wheel
    • Junghans J80/1, 680.70: 16 jewels, no shock protection, no separate cock for escape wheel
    • Junghans J80, 680.71: 16 jewels, shock protection, no separate cock for escape wheel
  • Manual winding, indirect sweeping seconds
    • Junghans J80, 680.72: 17 jewels, with or without shock protection, no separate cock for escape wheel
    • Junghans J80/2, 680.72: 15 jewels, no shock protection, no separate cock for escape wheel, for ‘Meister’ (master) watches
    • Junghans J80/2, 680.70: 17 jewels, shock protection, for ‘Meister’ (master) watches
    • Junghans J80/3, 680.72: 17 jewels, no shock protection, separate cock for escape wheel
    • Junghans J80/4: 16 jewels, no shock protection, no separate cock for escape wheel, for ‘Meister’ (master) watches
    • Junghans J80 S: 17 jewels, pallet fork and escape wheel made of polished steel, Nivarox I hairspring, for ‘Meister’ (master) watches
  • Automatic, indirect sweeping seconds
    • Junghans J80/12, 680.75: Automatic, indirect sweeping seconds, shock protection, power reserve indicator

• Listing ID: 8835
• Manufacturer / Brand: Junghans
• Caliber: J80/12, 80/12, 680.75
• Size in French Lignes: 12 1/2''' (10 1/2''' without rotor)
• 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...: None
• Other Functions: Power Reserver Indicator
• Jewels: 22
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Junghans II
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Approx. 40 hours
• Production Period: 1951 - 1953
• Country: Switzerland
• Identification: Movement marked with JUNGHANS and 80/12.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link 2: https://watch-movements.eu/blog/en/2020/11/01/junghans-j80-12-automatic-with-power-reserve/