Sign of the Times

Rick partners up with Rick Dale to prove to Corey that he struck oil with an old Gulf sign. Then, as an old 1930s collectible from the Indy 500 sends Chumlee racing, Corey snoops out what might be a Charles Schulz original illustration of the ever-popular Charlie Brown. Later, the Pawn Stars make a bet to see if a Philippine-American War knife will be a big score. Will this wager end in advance or defeat?