Gruen 405

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10 1/2 x 11 1/2”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

  • Movement family:
    • Gruen 405: 17 jewels, small seconds
    • Gruen 405SS: 17 jewels, indirect sweeping seconds
    • Gruen 406: 15 jewels, small seconds
    • Gruen 406SS: 15 jewels, indirect sweeping seconds
    • Gruen 425: 17 jewels, small seconds, differences to 405 not known
    • Gruen 425SS: 17 jewels, indirect sweeping seconds, differences to 405SS not known
    • Gruen 426: 15 jewels, small seconds, differences to 406 not known

 

  • Listing ID: 8047
  • Manufacturer / Brand: Gruen
  • Caliber: 405
  • Size in French Lignes: 10 1/2 x 11 1/2'''
  • Size range mm largest diameter: 22 - 31 mm
  • Shape: Form
  • Winding: Manual (Crown)
  • Hands Setting: Crown
  • Seconds Hand: Small seconds
  • Escapement: Lever (Swiss, English, Glashütte)
  • Date, Day, Month...: None
  • Jewels: 17
  • Setting Lever Screw/Pin Position: Left
  • Balance Position: Bottom (120 - 240°)
  • Shock Protection: None
  • Beats per hour: 18,000
  • Balance Type: Monometallic screw balance with Breguet hairspring
  • Power Reserve: Approx. 44 hours
  • Production Period: Unknown, probably around 1946
  • Identification: Movement marked with GRUEN WATCH and 405. Listed in the Swartchild catalog from 1946.
  • Country: Switzerland
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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