Colorized Silver Proof Coins. That complete the set – total of 20 silver coins and the original collector case. All coins come with Original Mint COA Folder Card (Missing only one COA Card). = 5% GST ONT = 13% HST PE. NL = 15% HST. Good Luck and Thanks for looking. Diameter: 27mm Material: Silver Fineness: 0.9999. Weight: 159.2 g Bullion Weight: 5.118 Troy Ounces.