^Lot 1164 Great Britain, copper alloy Admiral Vernon medal, 1739, Vernon / Porto Bello, ex-Adams (plate).

Great Britain, copper alloy Admiral Vernon medal, 1739, Vernon / Porto Bello, ex-Adams (plate). AC-PBv17O; Betts-176. 17.50 grams, 38 mm. Nice AVF with toning around details, light in color due to an unusually high admixture of tin (Adams: "The piece illustrated is struck in a hard metal such that the design and rims do not come up"), scarce. XRF: 42.87% copper, 35.74% zinc, 2.89% lead, 17.96% tin. Pedigreed to the John Adams Collection (with his handwritten tag), plated on page 61 of Medallic Portraits of Admiral Vernon (2010), by Adams and Chao.