A autographed watch featuring an artwork by the late U.S. artist Keith Haring is displayed as part of a 5,800 Swatch watches and related artworks collection during Sotheby's preview in Hong Kong March 10, 2015. Considered as one of the world's largest Swatch collections in private hands ever known, owner Paul Dunkel has collected Swatch prototypes, limited and special editions between 1983 and 2007. The collection is expected to fetch HK$10 million (US$1.28 million) in an auction on April 7, 2015, according to Sharon Chan, Sotheby's Head of Watches Asia. REUTERS/Bobby Yip (CHINA - Tags: SOCIETY BUSINESS)