Canada 1967 50 Cents PL66CAM PCGS, Howling Wolf With Lovely Blue Patina. KM-69. 11.66 gm 0.800 silver, 0.30 oz ASW. All of the 1967 Canadian coins are actually dual-dated 1867–1967, with fish and wildlife designs. As they were struck in 0.800 silver (with lots of copper alloy), they tend to tone up in outrageously beautiful colors, and the designs are quite popular as well! These were the last circulating silver Canadian fifty cent coins, as clad composition was adopted in 1968, with silver reserved for collector strikes only. PCGS Population: 3, 0 finer (5/2020).