Rubber stamps have a long history as a medium for cheap, easily reproduced and even "guerilla" art, with roots stretching back through the Fluxus movement to dada. A selection of stamps that originally appeared in Picasso "Daddaland" Gaglione’s San Francisco gallery uncovers this hidden history and even features a few items of interest to Duchamp fans.

At New York’s Stendhal Gallery through May 29.