LONDON.- Two trial proofs for Andy Warhol’s iconic image of a dollar sign are for sale at Bonhams Print sale on 29 November in London. The signed prints, estimated at between £15,000- 20,000, date from 1982 – just five years before the artist untimely death – and are based on paintings executed the year before. They are among the most obvious representations of the link he often drew between art and money, underlined by the high prices paid for them by collectors at the time and ever since. Other works by Warhol in the sale include a fine “Campbell’s Soup 1: Pepper Pot” (est £7,000-10,000); ‘Mao’ at £15,000-20,000 and ‘Skull’ at £10,000-15,000. Bonhams Director of Prints, Robert Kennan, said, ““Warhol continues to cast a spell over the contemporary art world and he is regularly voted the most influential artist of the 20th century. The very collectable single dollar si