Picture number three here

https://www.nrablog.com/articles/2016/3/nra-museums-guns-of-the-week

Cameleon Concept Revolver

During the Cold War, an ice rink technician in Czechoslovakia by the name of Karel Michalek dreamed of having his own handgun. But that dream could not easily be fulfilled as the Soviets severely regulated guns and ammunition. His only exposure to modern firearms came from observing local law enforcement and military arms as even gun magazines from the West were banned by the Iron Curtain.

Not letting any of that stop him, however, Michalek decided to make his own gun with the abundance of wood and epoxy compounds at his job. The result was a revolver completely unlike any you'd find on the shelves of an American gunshop. After the fall of the Soviet Union, the wonders of diplomatic channels saw Michalek’s ambitions creation, called the Cameleon and chambered in .44 Magnum, reach the NRA National Firearms Museum collection.

Otony