“Skeleton watches have evolved to more contemporary executions, stepping away from the traditional designs and more into clean bridges that expand the empty part of the movements as much a possible,” says Guido Terreni, managing director of Bulgari Watches.

While the Tourbillon Sapphir has assumed different guises since the crystal-intensive tourbillon launched in 2011, this year’s Tourbillon Saphir Ultranero ($198,000), limited to 30 pieces, presents a futuristic outlook in black DLC-coated titanium contrasted with spans of sapphire crystal punctuated with hits of glowing green SuperLuminova that highlights the watch’s hands, hour markers, and eye-catching microtubes that encircle the the drumlike case.

The hand-decorated in-house skeleton movement, has a 70-hour power reserve.

“The Ultranero Tourbillon Sapphire is built around the idea of a completely see-through watch—from the top, from the bottom, and from the side—it gives an extraordinary feeling of lightness. ” says Terreni. “The way it looks in the dark is the final touch that excites whoever is exposed to it.”

(Originally published on Art of Luxury at Forbes.com)