A one-of-a-kind 1930s Patek Philippe that belonged to Italian nobleman and race-car driver Count Felice Trossi is expected to fetch close to $2 million at Sotheby's in Geneva this Sunday. The oversize gold chronograph (pictured) is one of the largest timepieces ever made by the legendary Swiss watchmaker. Not to be outdone, Christie's Geneva branch is staging its own competing watch sale, starring two of the most important Pateks ever offered at auction, valued at $1.5 to $2.5 million each. No doubt Patek's own museum will be among the bidders.