12 1/2”’ | Tuning Fork | Sweeping Seconds |

Remarks:

• Chinese tuning fork movement, very similar to the Bulova 214, but not a clone like the Slava 2937. No parts are interchangeable between Bulova and Tianjin. The external dimensions are also different. The biggest differences are the lateral arrangement of the crown (Bulova: in the case back) and the attachment of the dial with the usual lateral clamping screws (Bulova: nuts on the back)

• Listing ID: 2829
• Manufacturer / Brand: Tianjin
• Caliber: ST4
• Size in French Lignes: 12 1/2''', Height 5.55 mm
• Size range mm largest diameter: 22 - 31 mm
• Shape: Round
• Winding: Battery
• Hands Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Tuning fork
• Date, Day, Month...: None
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Shock Protection: None
• Beats per hour: 360 Hz (not bph!)
• Balance Type: None
• Power Reserve: Unknown
• Production Period: Around 1970
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-32#post-4120903
• Country: China
• Contributor ©: Uhrforum.de member JackDaniels83