Interested in avant-garde methods of production, László Moholy-Nagy pioneered the use of industrial technology in art making. His 1922-23 work, EM 1 Telephonbild, to be offered in Sotheby’s Impressionist & Modern Art Evening Sale in New York, exemplifies the artist’s pure and geometric abstraction created during his years at the Bauhaus. Ahead of the auction on 14 November, watch this animated video to discover Moholy-Nagy's unique process, and why this work is a masterwork of 20th-century conceptual art.