William George "Bill" Bonin aka "The Freeway Killer" who was executed by the State of California on February 23, 1996. 

 Original prison kite written to convicted serial killer, Lawrence Sigmund Bittaker. Bonin writes that he will be going to the yard and wants to play cards with Larry and hand signed with his first name and cell number, Bill 62.
Bonin has written, '108' twice on the other side which was Bittaker's housing number.