The "IS" stamp on a silver spoon likely stands for International Silver Co, which was a prominent American silver manufacturer. The stamp helps to identify the manufacturer of the spoon and can also sometimes indicate the silver content of the piece.
331 mean on silver
silver
The 925 stamp mean the jewelry made from 92.5 percent silver.
The marking 925 on a spoon indicates that the spoon is made of sterling silver, which is an alloy containing 92.5% silver and 7.5% other metals, typically copper. This marking is a standard for silverware and indicates the purity of the silver used in the spoon.
what does 848 mean on silver
Don't no
Matt Hall
The Stamp YAG Means Gold Coated Silver
it means your gay
silver
The stamp KG on Sterling silver indicates that there is a gold inlay. The KG is an acronym for karat gold.