Great Britain, silver-plated cast copper-zinc Admiral Vernon medal, 1739, Porto Bello, very rare, ex-Adams.AC-PBvi11N.18.73 grams, 38 mm. Heavy piece crudely cast in "spongy" metal (mostly zinc) with light silver color from plating (a few darker areas), VF+ overall. Tested (XRF) at 67.40% zinc and 23.88% copper in addition to 5.27% silver from the plating (full results on small printout included).Pedigreed to the John Adams collection.
($250-375)