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I bought a putter about 20 years ago at a grage sale and it was old then. The grip is from the late 1960's , but that could be a re-grip. The bottom of the head is stamped "Sterling Silver (then a lower case slanted "f" in a home-plate design shield) Weighted" Any ideas on the mark and what "weighted" means? I am trying to establish the maker and a value. Thank you.