John Elway Signed Denver Broncos M&N Authentic Blue Jersey Beckett 40841 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 Denver Broncos Authentic Mitchell and Ness Blue size large Jersey that was personally signed by John Elway. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.