A hand signed Full Size Rawlings Replica Helmet of Oakland Athletics Legend MARK McGWIRE. The signature is in Black paint pen with the inscriptions "87 AL ROY & '89 WS Champs". This item was signed at a private signing with us. This would make a great addition to any CARDINALS collection! This item is guaranteed to be 100% authentic and will include a COA hologram from Beckett Authentication.