Swiss painter and sculptor (1925-1991) best known for his sculptural machines or kinetic art in the Dada tradition. Large mailing envelope, 15.5 x 10.5, addressed by Tinguely to art historian Siegfried Salzmann in Duisburg, postmarked August, 1980, with Tinguely adding a stroke of red paint, a green feather, a green sprig, and a sticker of a colorful bird in the upper left. In fine condition, with expected light handling wear. Salzmann was from, 1971 to 1984, Director of the Wilhelm Lehmbruck Museum in Duisburg, then, Director of the Kunsthalle Bremen. A one-of-a-kind example from one of the founders of art’s New Realism movement. RR Auction COA.