GREAT BRITAIN. Prince Frederick/Free British Fisheries Copper Medal, 1750. NGC MS-65 Red Brown. MI-659/365; Eimer-629. Diameter: 40.5mm. By L. Koch. Featuring red-brown brilliance that is seemingly electrified and quite dazzling, this impressive Gem radiates with beauty and concerns British fishing interests over those rivaling them from the Netherlands. Rather <strong>RARE </strong>this vibrant and impressive.