This is a high-quality, single-shot target air pistol, the RWS Diana Model 6G. I don't know if it is still made or not. An outfit in Ohio told me the piece can be serviced by an American distributor.
Like-new condition, having less than 100 pellets through it's barrel. Unfortunately, the pistol sat unused for six or eight years, and it will no longer discharge a pellet. There is a report on pulling the trigger but the pellet remains in the chamber. I have no knowledge of the mechanics of these guns and cannot say what the problem is. It could be a seal or ???
Sold AS IS, in factory box with original paper. Price: $125, includes shipping to USA destinations.
The pistol shown in the pictures is the one you will get. The yellow picture is its box.