4 3/4 x 10 1/2”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Movement family:
  • Gruen 327: 15 jewels, straight escape wheel pivots
  • Gruen 328: 17 jewels, conical escape wheel pivots
  • Gruen 329: 7 jewels, straight escape wheel pivots
  • Gruen 520: 17 jewels, conical escape wheel pivots, curved

• Listing ID: 17916
• Manufacturer / Brand: Gruen Guild
• Caliber: 327
• Size in French Lignes: 4 3/4 x 10 1/2''' (4 1/2''' according to manufacturer)
• Size range mm largest diameter: 22 - 31 mm
• Shape: Form
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: Right
• Balance Position: Right (0 - 120°)
• Holes in setting lever spring or rocking bar: 2
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: 1932+
• Country: Switzerland
• Identification: Movement marked with GRUEN GUILD, and with 327.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)