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

Remarks:

• Balance bridge instead of cock
• Hand winding possible
• Movement family:
  • Seiko 4205A: date
  • Seiko 4206A: date, day

• Listing ID: 10132
• Manufacturer / Brand: Seiko
• Caliber: 4205A
• 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: 17
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Seiko Diashock
• Beats per hour: 21,600
• Balance Type: Glucydur
• Power Reserve: Unknown
• Production Period: Unknown
• Identification: Movement marked with SEIKO 4205A. Original datasheet available.
• Country: Japan
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)