Confederate Conundrum

An 1861 Civil War saber finds its way into the shop - but if it's real, why was the blade never sharpened? Then Rick and the owner of a Chuck Berry autographed Fender guitar find themselves on different pages when it comes to bartering over this item. Finally, the Pawn Stars appraise a "1916 National Cash Register." It looks real, but will they pull out the money from their 2009 cash register?