someone told me once that many yats had pewter fittings, maybe yours are gilded pewter?
pewter is mostly tin (92%-ish) with a small amt. of copper and antimony to harden it.
tin is the 4th most precious metal after platinum,gold,silver (then tin).
older pewter may have some lead in there too, modern pewter does not.
pewter darkens it's grey colour as it ages.
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