11 1/2”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds |

Remarks:

• Sweeping seconds without hacking
• Three wheels on the bridge side with cap jewels
• Mainspring barrel with jewel bearings on the dial side
• Movement family (see extra picture):
  • Hand winding, 21,600 bph:
    • ETA 2750: no date
    • ETA 2752: date (quick-setting by repeatedly changing 20 – 24 o’clock)
    • ETA 2763: date (quick-setting on middle crown position)
    • ETA 2769-1: date (quick-setting on middle crown position), day (quick-setting on middle crown position)
  • Hand winding, 28,800 bph:
    • ETA 2751: no date
    • ETA 2764: date (quick-setting on middle crown position)
  • Automatic, 21,600 bph:
    • ETA 2776: no date
    • ETA 2773: date (quick-setting by repeatedly changing 20 – 24 o’clock
    • ETA 2781: height 5.9 mm, date (quick-setting on middle crown position)
    • ETA 2783: height 5.2 mm, date (quick-setting on middle crown position)
    • ETA 2789-1: date (quick-setting on middle crown position), day (quick-setting on middle crown position)
  • Automatic, 28,800 bph (rotor with ball bearings optional):
    • ETA 2791: height 5.9 mm, date (quick-setting on middle crown position)
    • ETA 2784: height 5.2 mm, date (quick-setting on middle crown position)
    • ETA 2790-1: date (quick-setting on middle crown position), day (quick-setting on middle crown position)

• Listing ID: 5152
• Manufacturer / Brand: ETA
• Caliber: 2751
• Size in French Lignes: 11 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 20
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 28,800
• Balance Type: Glucydur
• Power Reserve: Approx. 50 hours
• Production Period: Around 1976
• Country: Switzerland
• Identification: Movement marked with ETA 2751 under the balance. Manufacturer's data sheet from 1976 available.
• 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-61#post-8747970