I'll go with the drug store theory. I also think that maybe these are used guns. The slip on pad and the Jostam would be very unlikely on a new Parker. The pricing of various items would be a better clue to the age of the picture than the recoil pad or the configuration of the guns. In some unlikely areas, very high grade guns were displayed. When I was barely a teenager, Tendler's Sales Company, a jewelry and pawn shop at 913 D Street NW Washington, D.C. displayed English double rifles and high grade American shotguns in the window. This was in the early sixties. It is assumed that these guns were unredeemed pawn items. Chris' picture could be as late as the fifties or sixties.