What would 10KSR on the inside of a ring mean?

According to a source, 10K SR means solid 10K gold while SR is the manufacturer's mark.

Some might say that the SR means "silver". However, standard nomenclature or terminology would be .925 or sterling or some percentage, specifying the type of silver or percentage silver, not just silver.

“Karat” is a term that describes the purity level of gold. 10k gold is 41.6% gold, the lowest karat gold that can still be sold as “gold” in the US.

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