I got one of these for Christmas either 1960 or '61. Can't recall if the skeet house was included. If it was, it probably didn't work very well. Trying to shoot anything with the cork balls was silly. I remember the balls going wild with a mind of their own. This was under the tree in place of the BB gun (Daisy 25) that I really wanted . Had to wait a couple more years when mom finally bought me a Crosman 600 to take care of the rabbits that were invading her new landscaping.
They had a flat on the side of the barrel with a hole in the center. Place a round "sticky" cap onto the flat and the hammer (like an old percussion gun's) would hit the cap and send a bit of gas down into the barrel. Later versions had a hole drilled into the side of the barrel just ahead of the breech. (Guess they felt it was too dangerous.) I can remember back in the mid-Sixties we took one of these pistols and fed lady finger firecrackers down the barrel, pulling the fuse out of that convenient hole. The load was one firecracker and a small jawbreaker (they came in those pale blue boxes). Shooting at a brick wall from about ten feet, it would powder the candy. Of course, wouldn't want to try that today.