Gruen 440 Curvex

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8 3/4 x 9 3/4”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

  • Movement family:
    • Gruen 430: 17 jewels, plane back surface, capped escape wheel with conical pivots
    • Gruen 431: 15 jewels, plane back surface, straight escape wheel pivots
    • Gruen 435: non-precision version of the 431
    • Gruen 440: 17 jewels, curved back surface, capped escape wheel with conical pivots

 

  • Listing ID: 7692
  • Manufacturer / Brand: Gruen
  • Caliber: 440 Curvex
  • Size in French Lignes: 8 3/4 x 9 3/4'''
  • Size range mm largest diameter: 0 - 22 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. 36 hours
  • Production Period: 1940 - 1948
  • Identification: Movement marked with GRUEN on the ratchet wheel, and with 440 on the base plate. Listed in the Paulson catalog from 1940.
  • Country: Switzerland
  • Contributor ©: Uhrforum.de member Badener (Andreas Kelz)

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