11 1/2”’ | Hand Wind | Swiss Lever | Direct Sweeping Seconds |

Remarks:

• The Otero 840 appears to be largely identical to the Otero 740, but is 0.2 mm higher

• Listing ID: 5094
• Manufacturer / Brand: Otero
• Caliber: 840
• Size in French Lignes: 11 1/2'''
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Manual (Crown)
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Rufa-Anti-Shock
• Beats per hour: 21,600
• Balance Type: Nickel
• Power Reserve: Unknown
• Production Period: Unknwon, probably around 1970
• Identification: Marked with 840 and Otero logo. Listed in the Flume K3 catalog.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/#post-1123422
• Country: Germany
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)