There are two pieces to this card. The coloured image is on the card at the back. In the front, pivoted at the centre, is a clear piece of plastic printed with a series of black lines. As this top piece is rotated the resulting moiré fringes give the appearance of movement. Made by BIZARR verlag and printed in Germany.

When you look at the surface of this mirror it appears perfectly smooth. However, if you point the mirror towards the sun, and obtain a reflection from it on a piece of paper, an amazingly clear image appears, as illustrated. The mechanism of formation of images like this has been a topic of interest for many years. The collection also contains a printed copy of ‘The Japanese Magic Mirror’ which is the report of a talk and demonstration by Major C.H. Montgomery given before The Magic Circle on 16 May 1949. It was published as a Supplement to ‘The Magic Circular’, July 1949.