Little dexterity games like these are still popular today - just try to get everyone of the little balls into the round indentations - and you'll win. These are also called patience puzzles.
These little round games measure 1-5/16 inch in diameter and just over 1/4 inch high. The back of each game is black. The inside illustration varies:
These are not as clear as we'd like to see them, but they are over 50 years old, so some wear is to be expected. They are probably from the 1960s, or maybe earlier!
Small parts warning. Not for Children.
Small parts warning - not for children.
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