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375 is the marking for 9 carat gold. Usually vintage European will have this marking.
This marking means that the piece is gold plated. The 12K refers to purity of the gold. The 00/15 means that the gold is 15 per cent of the total weight.
It was stolen, recovered, then resold
that would be the manufacturers mark.
It means that thats where it was made
A 375 marking is a gold marking; it indicates 9K gold. You can find this by multiplying .375 by 24 (since there are 24 karats in pure gold). Visit the link below for more details about gold markings.
The 833 marking on gold signifies that it is 833 parts pure out of 1000. Translated to karats this would be 20kt, a popular purity used in Portuguese jewelry.
14 Karat Heavy Gold Filled(plated).
It means the ring is made out of 14 karat gold.
Gold and Diamond Mining
What dose trip a 3 mean on my Pontiac G5
It means REAL 14K Gold, 58.3% Solid Gold. GCJ is the manufacturer