8 x 10 1/2”’ | Hand Wind | Swiss Lever | Small Seconds

• Listing ID: 3918
• Manufacturer / Brand: Gruen
• Caliber: 400
• Size in French Lignes: 8 x 10 1/2'''
• 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: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Conoruma screw balance
• Power Reserve: Unknown
• Production Period: Unknown
• Identification: Wheel train bridge marked with Gruen Watch Co. 400 marked under the balance.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-18#post-2859064
• Country: Switzerland
• Contributor ©: Uhrforum.de member bollo