ANDY WARHOL (1928-1987), Autograph Mao Zedong postcard (1979-1980) signed ‘Andy Warhol’

signed 'Andy Warhol' in black marker (along the lower edge); stamp: 'AW Authorized by Andy Warhol Foundation for the Visual Arts', 'The Estate of Andy Warhol', Warhol's 'Interview' magazine stamp, authenticity verification hologram/ www.graphy.blog (on the reverse) black marker on postcard 20.2 x 20.2 cm accompanied by a certificate by Interview Magazine