Vijf jonge eendjes 

• 1975 
• Simplex Toys 
• Simplex Toys 
• Inlay puzzle [with buttons] 

The puzzle itself says: "(C) Simplex (R) made in holland". Information partly from the specialist site blauwprint.nl. and Wikipedia. The year is 1975. The last year of Simplex Toys' existence before being declared bankrupt.

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