Twenty pairs of test objects in carton, for use with Maddox cheiroscope Twenty pairs of test objects in carton
Cheiroscope, Maddox type, made by C. W. Dixey and Son Ltd., London, W1, England, 1920-1950. Cheiroscope, Maddox type 1920-1950
Two identical Maddox cheiroscopes without lamp attachments, made by C.W. Dixey and Son Ltd., London, 1920-1950 Two identical Maddox cheiroscopes without lamp attachments
Maddox cheiroscope by Clement Clarke Ltd., English Maddox cheiroscope by Clement Clarke Ltd., English