7 3/4”’ | Automatic | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Movement family:
  • ETA 2540: hand winding, no date
  • ETA 2541: hand winding, date
  • ETA 2550: automatic, no date
  • ETA 2551: automatic, date

• Listing ID: 7366
• Manufacturer / Brand: ETA / Dugena
• Caliber: ETA 2551 = Dugena 3309
• Size in French Lignes: 7 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 25
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 21,600
• Balance Type: Glucydur, Nickel
• Power Reserve: Approx. 42 hours
• Production Period: 1965-1972
• Identification: Movement marked with ETA logo and 2551 under the balance wheel. Original datasheet available.
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)