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

• Listing ID: 4485
• Manufacturer / Brand: Jeambrun
• Caliber: PS31 A
• 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: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: M. T. Antichoc
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: 43 hours
• Production Period: Unknown, probably around 1960
• Identification: PS31 marked under the balance + note in the Flume catalog that PS31 A has a ratchet wheel cover plate instead of ratchet wheel screw.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-10#post-2141323
• Country: France
• Contributor ©: Uhrforum.de member malikka