13”’ | Automatic | Swiss Lever | Direct Sweeping Seconds | Date | Day |

Remarks:

• Date with quick-setting, day without
• Movement family:
  • ETA 2620: 11 1/2”’, no date/day
  • ETA 2622: 11 1/2”’, date
  • ETA 2623: 13”’, date
  • ETA 2638: 11 1/2”’, date, day
  • ETA 2639: 13”’, date, day
• With suffix R with ball bearing rotor

• Listing ID: 10831
• Manufacturer / Brand: ETA
• Caliber: 2639
• Size in French Lignes: 13'''
• 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...: Date & Day
• Jewels: 17, 21, 25
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Incabloc
• Beats per hour: 21,600
• Balance Type: Glucydur
• Power Reserve: Approx. 42 hours
• Production Period: Unknown, probably around 1968
• Identification: Movement marked with ETA logo and 2639 under the balance wheel. Listed in the Flume K3 catalog from 1972. Original datasheet from 1968 available.
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)