12 1/2”’ | Hand Wind | Cylinder | No Seconds

• Listing ID: 3097
• Manufacturer / Brand: Blum & Grosjean
• Caliber: 12 1/2'''
• Size in French Lignes: 12 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown with lever
• Seconds Hand: None
• Escapement: Cylinder
• Date, Day, Month...: None
• Jewels: 10
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Brass
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1890
• Identification: Marked on the dial side with FABRIQUE D ARTS, a Blum & Grosjean trademark registered in 1883. According to Pritchard, the company produced its own movements from 10 to 14''' in diameter.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-29#post-3886457
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)