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

Remarks:

• The Madix brand is marked on the dial side. On the bridge side is the Madix logo (diamond and heart in a shield). Madix was a brand registered by Courvoisier in 1910

• Listing ID: 2270
• Manufacturer / Brand: Courvoisier
• Caliber: Model No. 121
• Size in French Lignes: 10 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• 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: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance
• Power Reserve: Unknown
• Production Period: Around 1918
• Country: Switzerland
• Identification: Registered by Courvoisier on 09.08.1918 in the Swiss Official Gazette of Commerce as Model No. 121. Model No. 121 is not an official caliber designation, but was used to register the design.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-39#post-5151376