12 1/2”’ | Automatic | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Date quick-setting by repeatedly pulling the crown
• Movement family:
  • Eterna 1427U: 11 1/2”’, automatic, no date
  • Eterna 1428U: 12 1/2”’, automatic, no date
  • Eterna 1429U: 13”’, automatic, no date
  • Eterna 1431U: 11 1/2”’, hand winding, no date
  • Eterna 1432U: 12 1/2”’, hand winding, no date
  • Eterna 1433U: 13”’, hand winding, no date
  • Eterna 1438U: 12 1/2”’, automatic, date
  • Eterna 1439U: 13”’, automatic, date
  • Eterna 1453U: 13 1/2”’, automatic, date
• The suffix U indicates the Eterna U shock protection
• A additional suffix B indicates a movement without seconds

• Listing ID: 20443
• Manufacturer / Brand: Eterna
• Caliber: 1438U
• Size in French Lignes: 12 1/2'''
• 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
• Jewels: 21
• Setting Lever Screw/Pin Position: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: Eterna U
• Beats per hour: 18,000
• Balance Type: Glucydur?
• Power Reserve: Approx. 48 hours
• Production Period: 1959+
• Country: Switzerland
• Identification: Movement marked with ETERNA-MATIC and with 1438U. Listed in the Marshall catalog from 1966.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)