Baume & Mercier William Baume Collection XL 43 mm Tourbillion

As serious collectors know, it's what's inside that counts. Geneva firm Baume & Mercier's new timepiece (available in the fall) lets you wear its heart on your sleeve (or under it) with a tourbillion that's visible through the crystal dome. Even better, unlike most automatics that let you get a glimpse of the action, this one counters any show-off tendencies with a case that's a study in decorum. Photo: Courtesy of Baume & Mercier