13 1/2”’ | Automatic | Swiss Lever | Small Seconds |

Remarks:

• First French automatic movement
• The base movement is the Ultra 602, the automatic module is attached and enlarges the base movement from 10 1/2”’ to 13 1/2”’
• The bidirectional automatic winding system is based on the same principle as the well-known Magic Lever winding system from Seiko, a variant of the IWC Pellaton winding system. However, Seiko’s Magic Lever was not launched on the market until 1959!

• Listing ID: 2625
• Manufacturer / Brand: Ultra
• Caliber: 603 "Superautomatic"
• Size in French Lignes: 13 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Small seconds
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 19
• Setting Lever Screw/Pin Position: Left
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Incabloc
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Around 1950
• Country: France
• Identification: Illustrated in repair documents from Ultra
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-32#post-4137344
• External Link 2: https://watch-movements.eu/blog/en/2018/07/01/ultra-watches-and-movements-from-france/