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The name "Target Champion" is put on many of the Performance Center offerings that are distributed by WISCHO in Germany. Most of those offerings have American counter parts.
Most WISCHO "Target Champion" offerings (auto or revolver) wear wood grips from Karl Nills.
The firearm pictured above looks like a PPC9, That is a 9MM Parabellum double stack, Single Action Only target pistol.
These are very limited firearms here in America. They were available in 5" or 6" as I recall
A slight variation on the PPC9 is the 5906PPC. They were also available in 5" and 6" versions but they were Traditional Double Action.
An additional variation on that firearm is the 3566Limited. These Single Action Only target pistols were only offered in the 356TSW chambering, but a second 9MM barrel could be purchased from the Performance Center. The 3566 family of autoloaders had a unique two tone finish
They are all extraordinary shooters. Very accurate, extremely well fitted with a spectacular SA trigger
They are all highly desired by collectors and shooters alike
If I were in your shoes, that firearm would already have been purchased.