8 3/4”’ | Hand Wind | Pin Lever | No Seconds |

Remarks:

• Pillar construction
• There is also an ORA OC1 (CLD) with date
• On the case back of watches with ORA OC 1, it often says “CAL OC R1”

• Listing ID: 1633
• Manufacturer / Brand: ORA
• Caliber: OC 1 / OC R1
• Size in French Lignes: 8 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: None
• Escapement: Pin Lever
• Date, Day, Month...: None
• Jewels: 0, 4
• Setting Lever Screw/Pin Position: Right
• Balance Position: Left (240 - 360°)
• Shock Protection: None
• Beats per hour: 18,000
• Balance Type: Nickel
• Power Reserve: Unknown
• Production Period: Unknown, probably around 1965 - 1975
• Country: Italy
• Identification: Marked OC 1 next to the escape wheel. The 1969 Engelkemper catalog lists the OC1, but without an illustration.
• 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-42#post-5482402
• External Link 2: https://watch-movements.eu/blog/en/2020/06/01/ora-oc-lings-mysterious-watch-brands/