Riddell SPEED Miniature Denver Broncos football helmet, autographed in white paint pen by Broncos Quarterback Trevor Siemian.

Signed at an official paid private autograph session held in 2016 (his rookie season).
Sold with Certificates of Authenticity from both The Autograph Source (Lifetime Guarantee) and independent third-party authenticator PSA/DNA (PSA/DNA RookieGraph COA – which proves it was signed during his rookie season).