4. Vacheron Constantin Tour de I’lle . $1.5 million
Produced as part of the 250th anniversary of Swiss manufacturer Vacheron Constantin, this masterpiece emerged as a simply stunning gold timepiece with non-reflective blue sapphire glass. Clearly designed with connoisseurs and not nearly as flamboyantly flashy as some of the other entries on this list, you might have trouble getting your fellow socialites to believe it actually costs $1.5 million.