Colin.I have the above watch bought inhong Kong the no is 13589292 brevit2592-1 plaque80microns any information please

 

Hong Kong is in Asia, on the mainland of China. Serial 13,5 mill = 1953 as production year. 2592-1 is the case reference. Brevet is the french word for patent. 80 micron placque is the thickest goldfill used by Omega. As time went by, they decreased it down to 40 micron and 20 micron even, as far as I can recall. Rose goldfill (which was commonly used in the 50ies) is the nicest