A prominent clue in this episode is purportedly one of General George S. Patton's "beloved pearl-handled Colt" revolvers. Patton owned various ivory-handled handguns, but eschewed the pearl-handled variety: "Only a pimp from a cheap New Orleans whorehouse would carry a pearl-handled pistol." It was something Gibbs, Ducky, or the billionaire collector would and should know.. Interestingly, the prop pistol does not appear to have pearl grips.
According to archive photography, Global War on Terrorism Service Medal was awarded to Petty Officer Marvin Finn. This medal was created in 2003, but PO2 Finn died in 2002.