Most watch movements are held inside the case. With the Bell & Ross BR-X2 Tourbillon Micro-Rotor Watch, the movement is the case. Built from 257 pieces, the watch has a 42.5mm movement frame cut from a solid plate of stainless steel, protected by two plates of carefully milled and polished sapphire, held together with four screws. The flying tourbillon is visible through an aperture at 6 o'clock, the indices and hour and minute hands coated in SuperLuminova, and the micro-rotor visible through the back. Finished with a gray alligator strap with a folding steel buckle and limited to just 99 pieces.
Most chronographs have pushers to operate the timer. The Porsche Design Monobloc Actuator Watch has them too — they're just integrated right into the 45.5 mm titanium case. Around the crown, you'll notice two subtle seams, the only hint that the entire piece pivots on a rocker out over the sapphire crystal to serve the same function as the missing pushers. It's powered by a modified Valjoux/ETA 7754 movement, arrives on either a natural rubber strap or matching titanium bracelet, and is available with a brushed black or muted-blue dial.