HCT is the maker of the jewelry
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Italian gold jewelry stamped "HCT 925" indicates that the piece is made of gold-plated silver. The "925" means silver no matter what color. "HCT" is the trademark of Floridian jewelry company, Harcourt, Inc.
Early Swarovski Jewelry was marked SAL
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Company name.
Platinum
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375 is the marking for 9 carat gold. Usually vintage European will have this marking.
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
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