Nate MacKinnon Signed Colorado Avalanche 16x40 Gallery Canvas JSA 43473 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a Colorado Avalanche 16x40 Gallery Wrapped Canvas that was personally autographed by Nate MacKinnon. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.