The Portland Collection, Commemorative Medals, Charles II and Catherine of Braganza, British Colonisation, silver medal, 1670, by John Roettier, conjoined busts r., CAROLVS ET CATHARINA REX ET REGINA, rev. globe, centred on Africa and showing the Eastern seaboard of North America, DIFFVSVS IN ORBE BRITANNVS 1670, 41.5mm. (MI.546/203; Eimer 245; Betts 44; Farquhar I, 256), choice extremely fine and sharp