50 Dollars - Elizabeth II 4th Portrait, GML Bullion Coinage (with radial lines and security leaf)

Canada's Gold Maple Leaf gained its security leaf and radial line background in 2013 and 2015 respectively, direct responses to a sophisticated counterfeiting problem that had embarrassed the Royal Canadian Mint. The laser-etched maple leaf micro-feature, visible only under magnification, was developed in partnership with the Canadian Bank Note Company — an unusual collaboration between a coin producer and a currency printer. The .9999 fineness itself, introduced in 1982, was a deliberate one-upmanship over the South African Krugerrand's .9167 standard, a commercial calculation that paid off handsomely in export markets.