Yoko Ono, A hole to see the sky through (1971)
Double sided postcard, 10.5 x 14.8 cm. Rare original first edition, published in 1971 by Klaus Staeck in Heidelberg.
Famous artists' card by Ono with die cut hole and instructional text on front. Printed text on verso: 'Originalgrafik Künstlerserie Nr. 14001 Yoko Ono (1971) München, Blick'. Unmailed copy, in mint condition.