My Selegiochi Escher collection 💙.As far as I can see there where 19 of these released.Mostly 1000 piece but a couple of 500s and one 3000. Still searching for the last five.
1000, Selegiochi, House of Stairs, Maurits Cornelis Escher - Rare Puzzles
Eye” Puzzle 1000 pieces – M.C. Escher – The Official Website