Jacob & Co. Casino Black Limited, New Black Onyx Dial CA100.40.AA.AA.ABALA

Jacob & Co. Casino Tourbillon reference CA100.40.AA.AA.ABALA encased in a polished 44mm 18K rose gold frame measuring 16.3mm in thickness, the timepiece features a sleek, crown-less silhouette protected by a heavily domed anti-reflective sapphire crystal. At its center, a deep black onyx medallion dial serves as the backdrop for skeletonized 5N rose gold hands and applied kite-shaped markers. The watch's true centerpiece is the fully functional mechanical roulette wheel complication encircling the dial, complete with 37 individually hand-lacquered pockets (numbered 0 to 36) in green, red, and black. Operated on-demand via a single pusher at the 8 o’clock position, a miniature white ceramic ball spins freely on low-friction ball bearings before settling randomly into a pocket. Powering this marvel is the manual-winding in-house Caliber JCAM51 movement, which hidden from the front, displays its one-minute flying tourbillon through a sapphire caseback aperture designed with a matching roulette motif. It boasts a robust 72-hour power reserve, 30 meters of water resistance, and comes elegantly secured to a premium black leather strap with an 18K rose gold folding clasp.