You can view this item on the SpenceLOA website and it shows when and where the item was signed.
Bills O.J. Simpson HOF 85 Signed 76-83 White TB Rep Mini Helmet JSA Witness
Salute to Service – Page 5 – The Jersey Source
OJ Simpson Auto White Buffalo Bills Signed Mini Helmet JSA Cert
OJ Simpson Auto White Buffalo Bills Signed Mini Helmet JSA Cert
OJ Simpson Signed HOF 85 Inscription Buffalo Bills Flash Speed Full-Si — RSA
NFL Memorabilia – Tagged Player_O.J. Simpson – Super Sports Center
Football - Mini-Helmets - Page 4 - Press Pass Collectibles
O. J. Simpson Signed Usc F/s Schutt Helmet W/ Heisman Jsa W *whi