I have a question about gold plating symbols on CCCP watches because I have 4 of them. does the number mean microns or does it mean the karat. It seems like it means the karat because the ones with the Au 20 are a darker yellow then the other ones. the one with just the AU seems to be the lowest type of gold plating because it is lighter in color than even the one that has AU 10.
My last question is, what would the symbol on a solid gold cased USSR watch look like