20”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Lépine = open face movement
• Type 3 is not an official caliber designation. As this is unknown, type <x> is used to distinguish between the different movement types of La Bisontine.
• The following types are known to date:
  • Type 1: cylinder escapement, keywind, cocks of the fourth wheel and the third wheel are connected
  • Type 2: cylinder escapement, crown winding with pusher, cocks of the fourth wheel and the third wheel are connected
  • Type 3: Swiss lever escapement, crown winding with pusher/lever, cocks of the fourth wheel and the third wheel are connected
  • Type 4: Cylinder escapement, crown winding with pusher, third wheel under the wheel train bridge
• Common to all types is the cover of the ratchet wheel and a special shape of the click. Types 1, 2 and 3 also have a common cock for the fourth and third wheel
• There are also 12”’ and 19 3/4”’ Savonnette (hunter) movements of this type 3. And a 18 3/4”’ Lépine Type 3.

• Listing ID: 13270
• Manufacturer / Brand: La Bisontine = Société anonyme d’horlogerie de Besançon / La Bisontine
• Caliber: Type 3 20''' Lépine
• Size in French Lignes: 20'''
• Size range mm largest diameter: > 40 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown with pin/pusher
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 15
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: Probably around 1900
• Country: France
• Identification: Not listed in any movement finder. See external link 2 below.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link 2: https://watch-movements.eu/blog/en/2021/11/01/la-bisontine-movements-and-watches-from-besancon/