• It's almost impossible to find a Black & Silver game used jersey of Ken Stabler. 
• It's KEY the COA reads worn by Ken Stabler, A lot are sold as Game Used but
• do NOT name the player who worn it. Check the COA's carefully.
• Even his HOF cabinet shrine has Saints, Alabama & I believe a Pro Bowl jersey.
• They have a purchased Raiders jersey of his in the lobby. 

Only 20 of these cards were made and the key sub grades are either Gem Mint

or Pristine! Low, Low Population. 

BGS grades much tougher than PSA, so this is a PSA 9+++ or a 10. 

• Snake wore this as an Oakland Raiders QB in an official NFL game. 

04/20 and as a BGS population. No doubt much lower.