This unusual item involves a geometrical puzzle made up of one red piece and several white pieces which are assembled within a small wooden box TO MAKE A COMPLETE SQUARE.
The pieces are tipped out and the puzzle is then reassembled in the box to form a complete square once again, but this time WITHOUT USING THE RED PIECE.
The lid is placed back on the box containing the completed all-white puzzle, attention is drawn to the odd red piece remaining on the table, and then the box is reopened to reveal that it now contains AN ALL-RED PUZZLE WITH ONE PIECE MISSING. The spare red piece is then fitted into position, completing the puzzle once more.
The box is 8.3 cms square and is made in solid, hand-polished teak. A Chinese motif set in relief decorates the lid. The two puzzles are made in white and red plastic.
This beautiful piece of apparatus, which is easy to handle and completely self-contained, is handmade by the originator of the effect.