and American history expert Mark Hall Patton, pictured above in his trademark red shirt and hat. Without these knowledgeable ...

Sometimes, a deal is not meant to go through, as an interaction that Rick Harrison had on an episode of Pawn Stars proved ... Once the expert, Mark Hall-Patton, was called in and confirmed it ...

Mark Hall Patton is "The Beard of Knowledge" on the popular tv show "Pawn Stars" Mr. Patton also was the Historian at the Clark Country Museum in Las Vegas, Nevada until his retirement in 2020.