[Paris: Privately published by the artist, 1957].
A single perforated postage stamp painted with Klein's famous IKB (International Klein Blue) pigment. The stamps were originally created to use on invitations for his simultaneous 1957 exhibitions in Paris at the Gallerie Iris Clert and Gallerie Colette Allendy. This unsent stamp retains its original blue luster. Mail Art scholar John Held, Jr. writes: "With the mailing of his blue stamp, Klein not only created one of the first artist postage stamps, but also involved it in a postal action, prefiguring not only the widespread genre of artistamps in the following decades, but the conceptual philatelic actions of the Fluxus group in the sixties..." Fine example of this small, but iconic item. Provenance: the archive of famous Swedish graphic designer John Melin, probably best known for the innovative visual style he brought to the Moderna Museet during the '60s and '70s with his designs for catalogs, posters, and exhibitions.