^Lot 1580 Great Britain, copper alloy Admiral Vernon medal, 1739, Vernon and Fort Chagre / Porto Bello, ex-Fer

Great Britain, copper alloy Admiral Vernon medal, 1739, Vernon and Fort Chagre / Porto Bello, ex-Ferrari, ex-Chao, ex-Adams. AC-FCv15W. 14.39 grams; 37 mm. Very dark and oxidized XF but with all details nevertheless clear enough to identify the variety, which, with just three examples reported, AC calls "decidedly scarcer" than the others with the same obverse, the reverse showing a "grotesque appearance... probably the result of repair work done to a failing die." XRF: 74.44% copper, 23.06% zinc, 1.85% lead. Pedigreed to the John Adams Collection (with his handwritten tag) and to the Fernando Chao and Jorge Ferrari Collections.