“Optica” Card Illusion

Invented by Edward Bagshawe, this trick was sold by Davenports. The advertisement from Davenports illustrated here gives details. In summary, the cards may be shown to be all the same, or all different, or all with red backs, or all with blue backs. Complete with instructions copyright Edward Bagshawe, printed and published by L.D. & Co, London. Davenports purchased his business following his death in 1940.