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

Remarks:

• Movement family:
  • ETA 2640: 21,600 bph, hand winding
  • ETA 2641: 21,600 bph, hand winding, date
  • ETA 2650: 21,600 bph, automatic
  • ETA 2651: 21,600 bph, automatic, date
  • ETA 2658: 21,600 bph, automatic, date, day
  • ETA 2660: 28,800 bph, hand winding
  • ETA 2661: 28,800 bph, hand winding, date
  • ETA 2670: 28,800 bph, automatic
  • ETA 2671: 28,800 bph, automatic, date
  • ETA 2678: 28,800 bph, automatic, date, day
• Options:
  • Rotor with ball bearings
  • Hacking seconds
  • Fine regulation

• Listing ID: 7320
• Manufacturer / Brand: ETA / Bulova
• Caliber: ETA 2670 = Bulova 7 UBAC
• 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...: None
• Jewels: 17, 21, 25
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 28,800
• Balance Type: Gold-plated nickel?
• Power Reserve: Approx. 38 hours
• Production Period: Unknown, probably around 1970+
• Identification: Movement marked with ETA 2670 under the balance wheel. And with CARAVELLE (a trademark of Bulova) 7 UBAC on the rotor.
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)