^Lot 1186 Great Britain, copper alloy Admiral Vernon medal, 1739, Vernon and Brown / Porto Bello, ex-Adams.

Great Britain, copper alloy Admiral Vernon medal, 1739, Vernon and Brown / Porto Bello, ex-Adams. AC-PBvb7L; Betts-255. 14.27 grams, 39 mm. Choice AU+ with much original color and traces of luster (higher tin content than usual), natural rim-flaw on reverse and faint die-buckle on obverse. Adams: "this variety is intentionally upgraded, with very high double rims… made for an upscale market… the dies [lasting well and] used to failure, with later states featuring a buckled obverse and rim crumbling on both sides." XRF: 38.54% copper, 52.93% zinc, 3.68% lead, 4.37% tin. Pedigreed to the John Adams Collection (with his handwritten tag).