What caret
There is a purity level of 910 for silver but I don't think that is what its referring to because its rarely used. It might be a marking from the Jeweler you received it from.
Platinum
peanut butter
375 is the marking for 9 carat gold. Usually vintage European will have this marking.
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).
The marking "SAL" on jewelry typically stands for "Sterling A.L." which indicates that the piece is made of sterling silver. Sterling silver is an alloy containing 92.5% silver and 7.5% of other metals, usually copper. This marking is a guarantee of the quality and purity of the silver used in the jewelry piece.
The marking "264" on gold jewelry typically indicates the purity of the gold alloy used in the piece. The number represents the proportion of gold in the alloy, with "264" meaning the jewelry contains 26.4% pure gold, which corresponds to approximately 6.35 karats. This marking helps consumers understand the quality and value of the gold jewelry they are purchasing.
HCT is the maker of the jewelry
925 is a marking for sterling silver , Italy is where it is from and ITAOR Is the designer of the jewelry .
910
it could be the maker of the necklace. i have a chain that says oTc lie that and its the makers marking