On one side is the rebus and a blank area where the address or name of the recipient can be written. The other side has the show details on it, as well as the answer to the rebus. This means that the card can be folded in half and glued around the perforated edges, prior to posting, so that the recipient can only see the rebus and their own name. To open the card they have to tear off the edge at the perforations, so revealing the details of the show and the answer to the rebus. Have a go at solving the rebus before you click on View Details.

The puzzle is to open the piece. It advertises M.C.L. AND REPETITION LTD. The outer surface also includes the words BRITISH ALUMINIUM BA-35. This will be the alloy type from which the puzzle is machined.

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.