An artist's proof of Robert Indiana's iconic LOVE (Red/Blue) sculpture is valued at $600,000-800,000 ahead of Sotheby's Contemporary Curated auction in New York on March 7.
The work is numbered one of an edition of four and stands at almost six feet tall.
Created between 1966 and 1968, the sculpture is instantly recognisable, having stood in the John F Kennedy Plaza in Philadelphia, and Sixth Avenue in New York.
Indiana first created the design as a Christmas card sent out by the Museum of Modern Art in New York in 1964, later producing a postage stamp and then a series of sculptures that were deployed in public places throughout the US.
It was co-opted by the hippie movement in the 1960s, and since then has been parodied and reproduced endlessly.
In 2011, a 12 foot LOVE sculpture sold for $4.1m.
Richard Prince's Untitled (Cowboy) is valued at $500,000-700,000.
The work is an example of Prince's rephotography technique, where the taglines and titles of adverts are removed - reducing them to dreamlike artifices.
The series is drawn from Malboro's well-known campaign, which used the image of the cowboy to sell filtered cigarettes to men at a time when they were considered a feminine product.
The record for Prince's work at auction was set in 2008, when his painting Overseas Nurse sold for $8.4m.
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