STORE NEWSLETTER SIGN UP. A coin with a certificate of authenticity and a box! 0.9999 / PROOF. MINIMUM GROSS WEIGHT (G). The item “Canada 2020 $50 Moving Hummingbird and the Bloom 5OZ Pure Silver Proof Coin” is in sale since Thursday, December 3, 2020. This item is in the category “Coins & Paper Money\Coins\ Canada\Commemorative”. […]