With that instrument panel to one side and forward low windscreen, it looks like an amphibian with a front door. A homebuilt or heavily modified Seabee? (I think the Spencer Air Car has a stick.) The only other candidate I can think of is the Canadian TR-1 Trigull from the 1960s, although this is much moderner than that. (It had the same control column arrangement in front of the instrument panel as the Seabee. It looks like it could be accomodated in the slot visible in the photo.)