Brazil, Empire, Medal for Rio da Prata and Tonelero 1851, large medal, 95 x 59mm., bronze-gilt electrotype, surmounted by a gold Pedro II type crown, edge inscribed, ‘Ao Vice Almirante Commandante em Chefe das Forcas Navaes John Pascoe Grenfell’, with gold loop for neck wear, some corrosion by suspension, good very fine, rare £300-400