Put the same colours together. The white center piece can only slide up and down.Pieces cannot fall out due to transparent top plate. Matererial. Acryl.The pieces are covered with transparent foil. You can slide without damage.
Copy produced by puzzle design Ton Delsing.F. D. The world famous Initials. Frank Delano Roosevelt's Initials.Registered U.S. Patent Office.The F consisted of 5 red pieces, the D of 6 blue pieces.Material. Thin Plastic.
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