Auctioneer Aurel Bacs knows what makes watch enthusiasts tick, as he puts exquisite, rare and vintage timepieces on the auction block. For 30 years, Bacs has sold luxury timepieces at the world's most celebrated auction houses. Over the past decade, he and his wife, Livia Russo, partnering with Phillips Auctioneers, have been responsible for $1.6 billion in watch sales, catering to thousands of collectors from around the world. Correspondent Mark Strassmann talks with Bacs, who says watch collec