"925" markings on sterling silver defines it as 92.5% pure silver with 7.25% being a strengthening alloy,usually copper.
A "975" marking can only mean 97.5 % pure silver and indicates a high quality sterling item. It is not often seen,and my guess is that this must be a very old piece or a newer item that uses extra sterling silver in its production.
Either way,if you own a "975",you have a very nice piece of sterling !!
Silver stamped 975 will not turn your finger green.
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incest
CR Co stamped on jewelry stands for Crown Jewelry Company, indicating the manufacturer or distributor of the piece.
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