6 3/4 x 7 3/4”’ | Hand Wind | Swiss Lever | No Seconds |

Remarks:

• Movement family
  • Gruen 270: 17 jewels, capped escape wheel with conical pivots, no seconds
  • Gruen 270SS: 17 jewels, straight escape wheel pivots, nurses’ sweep-seconds movement
  • Gruen 271: 15 jewels, straight escape wheel pivots, no seconds
  • Gruen 271SS: 15 jewels, straight escape wheel pivots, nurses’ sweep-seconds movement

• Listing ID: 17949
• Manufacturer / Brand: Gruen
• Caliber: 270
• Size in French Lignes: 6 3/4 x 7 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°)
• Holes in setting lever spring or rocking bar: 3
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: 1936+
• Country: Switzerland
• Identification: Movement marked with Gruen on the wheel train bridge, and with 270 under the balance wheel.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)