The vast majority of the puzzles are mechanical puzzles rather than word or mathematical puzzles.

La Mystérieuse

Cut the postcard into 3 pieces. Where does the 16th card go when the position of the two lower pieces are reversed? The postcard advertises Martinka & Co., a magic shop in New York City.

    • Size
    • The card has been slightly cropped. The cropped size is 135mm x 85mm.
    • Date
    • The front of the card states that it is Copyright 1907 by T. L. DeLand Jr. The card probably dates from 1907 to the 1920s.
    • People_or_organisations
    • Martinka, T.L. DeLand Jr.
    • Key_phrases
    • Vanish, advertising items
    • Category
    • Ref._no.
    • P378 W10

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