12”’ | Hand Wind | Swiss Lever |Sweeping Seconds | Date |

Remarks:

• The Chinese Standard Movement, also known as (统机 Tongji = ‘Unified’) or Chinese 2506, was developed in the 1970s as part of the Chinese planned economy. The result was a movement similar to the Enicar AR1010, which was produced in more than 30 factories until the end of the 1970s
• The common basis was the manual wind version with 17 jewels and no date. Various factories later added date functions and automatic modules to the movement independently. These parts are therefore not interchangeable between movements from different manufacturers
• The movement is still in production today, with skeletonized versions preferred, albeit in increasingly poor quality. The surfaces are often scratched, the accuracy of fit is poor and the jewels are sometimes without oil sinks. The movements can run reasonably well for a while, but overall they are unfortunately among the worst movements produced today
• Other variantes of this movements:
  • Chinese Standard Movement (统机 Tongji) (no date)
  • Chinese Standard Movement (统机 Tongji) Automatic

 

• Listing ID: 4342
• Manufacturer / Brand: Many chinese manufacturers
• Caliber: Chinese Standard Movement (统机 Tongji) Date
• Size: 12'''
• Shape: Round
• Winding: Manual (Crown)
• Hand Setting: Crown
• Seconds Hand: Sweeping seconds (central seconds)
• Escapement: Lever (Swiss, English, Glashütte)
• Date & Day: Date
• Jewels: 17
• Setting Lever Screw/Pin Position: Right
• Balance Position: Bottom (120 - 240°)
• Shock Protection: Mostly similar to Incabloc
• Beats per hour: 21,600
• Balance Type: Unknown
• Power Reserve: > 40 hours
• Production Period: Since approx. 1972
• Identification: Characteristic shape of the setting lever spring and the wheel train bridge.
• External Link: https://uhrforum.de/threads/identifizierte-uhrwerke-die-weder-bei-ranfft-lorenz-noch-im-watch-wiki-zu-finden-sind.86322/page-12#post-2304544
• Country: China
• Contributor ©: Uhrforum.de member Badener (Andreas Kelz)