HCT is the maker of the jewelry
Early Swarovski Jewelry was marked SAL
peanut butter
Platinum
ts
375 is the marking for 9 carat gold. Usually vintage European will have this marking.
Sausalito Craftworks!
The 220 hallmark on jewelry means it is a commercial bronze alloy.
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.
VCLM jewelry is vintage pieces of costume jewelry with a specific marking of "VCLM." They are created by the vintage jewelry company VCLM.
HMS is a company that specializes in 18k, 14k, 10k and platinum jewelry
All SOLID gold jewelry will have a marking indicating the karat composition. It is usually small and discrete. Most common is 10K, 14K, 18K, 24K. If it doesn't have a marking it is not solid gold.