In the past, his Chinese name was "Frye", but now he is often called "President". I don't remember the classification level of China in the 1950s and 1960s, which was after the fourth category. The historical position of this brand is also very story-telling, which is related to several brands, such as Favre Leuba, Bovet, Vulcain and Thomman.

REVUE THOMMEN started by manufacturing aviation instruments, including altimeters, barometers and tachometers. In this field, REVUE THOMMEN has reached the world leading level. Today, REVUE THOMMEN's instruments are still widely used in Boeing, Airbus, Saab, Pilatus and Augusta.

Revoe Thommen, the presidential watch factory, was established in 1853. In the early days, there was only one trademark, Revoe E. Under this group, there are some factory trademarks, such as Marvin, VULCAIN and PHENIX. About 20 years ago, the trademark was changed to Revoe Thommen. Until 1999, Revoe Thommen's watches were only available in Vulcan &；; It is exclusively authorized by STUDIO SA. After 1998, VULCAIN company fell into financial difficulties due to the Asian and ruble crises.

Since 1999, Vulcan has been looking for new investors to save the company's crisis, but it was not realized until July 2000. Vulcan filed for bankruptcy protection in July 2000, terminated the trademark contract of REVUE THOMMEN, and the trademark right of REVUE THOMMEN returned to REVUE THOMMEN Company in Vardenburg.

After a long period of mediation, GROVANA UHRENFABRIK AG obtained the trademark right of REVUE THOMMEN watch. GROVANA has convincing technology in watch assembly, and GROVANA has specialized agents in more than 60 countries. It can provide global maintenance support services. On February 200 1 year/day, GROVANA took over all the warehouses and production equipment in VAULCAIN. After 1 years of rectification, REVUE THOMMEN now has two types of timers.

In my opinion, your watch is collectible. K23 1 1A refers to the version, model and serial number.