Description
Spalding Official NBA miniature basketball (Adam Silver Commissioner), signed in black marker by the Boston Celtics Kristaps Porzingis.
Signed at an official paid private autograph session held in 2015 (his rookie season).
Sold with a Certificates of Authenticity from independent third-party authenticator PSA/DNA (PSA/DNA RookieGraph COA – which proves it was signed during his rookie season).
