Het Muizenhuis 

• 1974 
• 1113 
• Simplex Toys 
• Fisher Price 

After 1972, based on information from the specialized site www.blauwprint.nl. Image of the box reproduced with permission. Stamp on the cardboard backing: "Simpex Toys. Made in Belgium. Non-toxic paints". The puzzle comes in a round and a square variant. Simplex Toys initially released the puzzle in a round shape and later in a square shape. This difference most likely stems from the fact that the old stock of round Simplex puzzles was used up first.

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