Gruen 311 Curvex

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7 3/4 x 11 3/4”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

  • Movement family:
    • Gruen 311: Curvex (curved bridge side), hidden winding parts
    • Gruen 355: flat dial and bridge sides, exposed winding parts
    • Gruen 355C: curved dial side, flat bridge side, exposed winding parts

 

  • Listing ID: 8748
  • Manufacturer / Brand: Gruen
  • Caliber: 311 Curvex
  • Size in French Lignes: 7 3/4 x 11 3/4''' (7 3/4 x 11''' according to the manufacturer)
  • 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. 40 hours
  • Production Period: 1935+
  • Identification: Movement marked with GRUEN and 311. Listed in the Paulson catalog from 1950.
  • Country: Switzerland
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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