7 3/4”’ | Automatic | Swiss Lever | Direct Sweeping Seconds | Date |

Remarks:

• Automatic with bidirectional winding
• Direct sweeping seconds
• Date with quick setting

• Listing ID: 2512
• Manufacturer / Brand: Ricoh
• Caliber: 251
• Size in French Lignes: 7 3/4'''
• Size range mm largest diameter: 0 - 22 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date
• Jewels: 22
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: Unknown, probably Ricoh specific
• Beats per hour: 21,600
• Balance Type: Gold-plated nickel?
• Power Reserve: Unknown
• Production Period: According to the book by Hampel around 1975
• Country: Japan
• Identification: Rotor labeled RICOH. According to Hampel, the 251 is the only ladies' automatic movement from Ricoh.
• 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-36#post-4505119
• External Link 2: https://watch-movements.eu/blog/en/2019/12/02/ricoh-automatic-watch-movements/