12 3/4”’ | Automatic | Swiss Lever | Sweeping Seconds | Date |

Remarks:

• Automatic with bidirectional winding, manual winding possible
• Sweeping seconds without hacking
• Date quick setting by changing 21 – 24h
• Rotor with ball bearings
• Part of a very large family “Ricoh 30” of movements -> see external link 2 below!

• Listing ID: 2181
• Manufacturer / Brand: Ricoh
• Caliber: 48
• Size in French Lignes: 12 3/4''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Automatic
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: Date & Day
• Jewels: 21
• Setting Lever Screw/Pin Position: Left
• Balance Position: Left (240 - 360°)
• Shock Protection: Monorex
• Beats per hour: 18,000
• Balance Type: Gold-plated nickel?
• Power Reserve: Approx. 38 hours
• Production Period: From approx. 1970
• Country: Japan
• Identification: The reference number on the case back of thModel number on the watch case back starts with 48. There are only two movements in the Ricoh 30 family (see notes above) that do not have a day indicator.
• 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-41#post-5292946
• External Link 2: https://watch-movements.eu/blog/en/2019/12/02/ricoh-automatic-watch-movements/