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

Remarks:

• Automatic with bidirectional winding, manual winding possible
• Sweeping seconds without hacking
• Date quick setting by repeatedly pulling the crown
• Day without quick setting
• Rotor with ball bearings
• Part of a very large family “Ricoh 30” of movements -> see external link 2 below!

• Listing ID: 1701
• Manufacturer / Brand: Ricoh
• Caliber: 40
• 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 New
• 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 the watch begins with 040 and the dial is labeled R40. Data sheet of the Ricoh 40A is available.
• 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-43#post-5560001
• External Link 2: https://watch-movements.eu/blog/en/2019/12/02/ricoh-automatic-watch-movements/