These Swiss Mountains Jigsaw Puzzles were designed by Jürg as a handout at Jürg's mothers 70iest birthday. Three major alpine mountain landscapes were used: a) Eiger, Mönch & Jungfrau, b) Sichel vom Justistal, and c) Niesen vom Suldtal. The 2 chessboard designs were just an experiment. Overall about 40 puzzles were produced.