Pure Silver Proof Coin Canada. 25th Anniversary of Canad a's National Arboreal Emblem: Maple Leaf Privy Mark. Low Mintage 6,000 Worldwide.Incuse depth of 1.5mm. The item "2021 Super Incuse Silver Maple Leaf SML $20 1 oz. Pure Silver Proof Coin Canada" is in sale since Sunday, June 13, 2021. This item is in the category "Coins & Paper Money\Bullion\Silver\Coins". The seller is "canadacoinchest" and is located in Vaudreuil-Dorion, Quebec. This item can be shipped worldwide.