ANDY WARHOL (1928-1987), AUTOGRAPH 8 postcards Campbell’s Soup Cans signed ‘Andy Warhol’

eight postcards featuring ‘Campbell’s Soup Cans’ executed between November 1961 and March or April 1962 by Andy Warhol, each signed by the artist with black/ red marker:‘Andy Warhol’ (along the lower adge); each stamped: ‘AW Authorized by Andy Warhol Foundation for the Visual Arts’, ‘The Estate of Andy Warhol’, stamp of Warhol’s magazine ‘Interview’, hologram verification of autenticity/ www.graphy.blog (on the reverse) 14 x 10.5 cm (each postcard), plate 43 x 97 cm