19 1/2”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Hours and minutes displayed by jumping numerals
• Based on US patent 347139 by Gedeon Thommen in 1886
• The company later became Revue Thommen
• Hidden pallets

• Listing ID: 13290
• Manufacturer / Brand: Thommen
• Caliber: Patent Jumping Numerals
• Size in French Lignes: 19 1/2'''
• 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
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Bimetallic screw balance with Breguet hairspring
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1886
• Country: Switzerland
• Identification: Described in US patent 347139.
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)