Bottems up

Ben Vautier, 'Bottoms', ed. Fluxys, NY, ca. 1973
poster with 2 stills from Yoko Ono's film 'Number 4'
on the reverse the handwritten text by Ben:
'this is a poster by Maciunas, at the time he said it could be a Hole by Ben or an Ass by Yoko'
for sale via multiples