5 1/2 x 6 3/4”’ | Hand Wind | Swiss Lever | No Seconds

Remarks:

• Movement family:
  • Gruen 290: 17 jewels, plane back surface, capped escape wheel with conical pivots
  • Gruen 291: 15 jewels, plane back surface, straight escape wheel pivots
  • Gruen 295 Curvex: 17 jewels, curved back surface, capped escape wheel with conical pivots

• Listing ID: 7981
• Manufacturer / Brand: Gruen
• Caliber: 290
• Size in French Lignes: 5 1/2 x 6 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown
• Identification: Movement marked with GRUEN on the wheel train bridge, and with 290 under the balance wheel. Listed in the Paulson catalog from 1950.
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)