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

Remarks:

• The Cyma / Tavannes caliber 18 is available in different other sizes and as Lépine (open face) and Savonnette (hunter), each with a different reference number

• Listing ID: 20588
• Manufacturer / Brand: Cyma / Tavannes
• Caliber: 18 Ref 787
• Size in French Lignes: 17'''
• 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: Left
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1936
• Country: Switzerland
• Identification: Movement marked with CYMA on the ratchet wheel, and with Ref. 787 under the balance wheel. Listed in the Classification Horlogère from 1936.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)