18 1/2”’ | Hand Wind | Swiss Lever | Small Seconds |

Remarks:

• Curved regulator, the display of which is not on the balance cock as usual, but on the wheel train bridge

• Listing ID: 2823
• Manufacturer / Brand: Ultra
• Caliber: 18'''
• Size in French Lignes: 18 3/4''' (according to manufacturer 18''')
• 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: Right
• Balance Position: Right (0 - 120°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Monometallic screw balance
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1933
• Identification: Balance cock marked ULTRA. Listed in a catalog of Geismar from 1933.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-32#post-4130785
• External Link 2: https://watch-movements.eu/blog/en/2018/07/01/ultra-watches-and-movements-from-france/
• Country: France
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)