12 size = 17 1/2”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Swan-neck fine regulator
• Caliber 51 is available in the bridge variants N., R., S., J., K. and W. (all Lépine = open face) as well as with normal and negative winding
• This movement here has a negative winding system. The normal winding has a different setting lever spring
• Similarly, all variants are also available as Savonnette (hunter) caliber 52

• Listing ID: 3039
• Manufacturer / Brand: Record
• Caliber: 51 J.
• Size in French Lignes: 12 size = 17 1/2'''
• Size range mm largest diameter: 31 - 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Setting Lever Screw/Pin Position: None (Negative Winding)
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance with Breguet
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1936
• Identification: Listed in the Classification Horlogère from 1936
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-30#post-3956887
• Country: Switzerland
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)