Richard Mille, the Swiss watchmaker with the penchant for highly technical designs, has unveiled the ne plus ultra timepiece for the svelte set.

The firm has given the watch a typically technical moniker—the RM UP-01—and designed it with help and inspiration from Ferrari. The dial incorporates the shape of the Ferrari steering wheel, and a subtle engraved Prancing Horse logo adorns the front of the watch.

Not quite 2 millimeters thick — 1.75, to be precise, about the same thickness as a United States quarter — the RM UP-01 is, Richard Mille says, the thinnest mechanical watch ever produced. It’s thin enough so that, from the side, it can only be distinguished from its band by the metallic tone of its titanium case, and its plateau-like shape.

Unique it is, and rendered more unique still by the fact that a special key is needed to set the watch and wind it. It comes with a 45-hour power reserve.

Richard Mille has priced the RM UP-01 watch at $1.88 million. The firm plans to make 150 examples.