I think I saw this at Terry Price's jukebox shop in the 1990s. In those days early British wall machines were much sought after by the first generation of collectors, two of whom bid against each other to acquire it on the basis of photos only. I can't remember the figure, but it was high and I suspect the buyer didn't realize how much was missing.
I'm not sure I've seen another example, or even picture of this game. It probably did have a carved pediment of some sort, but not the one above. I can't make out where the coin slot is - bottom right side above the trigger?
Clearly the object is to shoot your coin into the middle channel, whereupon it would be brought to rest against a lever (missing) which would release the token payout mechanism (missing) when the knob (bottom left side of cabinet) is pulled. A coin in the left channel would, I assume, be returned - i.e., directed by a coin track (missing) back to the payout cup (missing) below the token payout knob. A coin in the right or 'lost' channel would obviously have been guided to a cash box by more coin channelling.
Quite a project if you intend to get it working, but very eye-pleasing.