Lawrence Bittaker serial killer dubbed the "Toolbox Killer.” Bittaker was sentenced to death in March 1981 while his accomplice Roy Norris received 45 years to life.

Feed the sharks pop up card made on San Quentin State Prison death row. The front of the card reads, "Come visit scenic California! Climb the rugged mountains; fish the rivers; Ride the surf and ...", when you open the card a shark pop ups and the inside reads, Feed the Sharks!

Bittaker didn't like making this particular card (technical reasons) so fewer of these are known to exist than some of his other cards.
Hand signed on the back, 2011 SQSP LS Bittaker #2.