Harry Winston's newest Histoire de Tourbillon watch.

—ROBERTA NAAS, ATimelyPerspective.com

This year marks the fourth year that the esteemed Harry Winston brand releases the Histoire de Tourbillon—this time the Histoire de Tourbillon 4—one of the most complex mechanical timekeepers. The watch boasts a triple-axis tourbillon design to ensure that the tourbillon escapement is always in a different position and, hence, offering remarkable accuracy.

The first cage (housing the oscillator and escapement) rotates once every 45 seconds; the intermediate cage rotates once every 75 seconds; and the outermost cage rotates once every 300 seconds. The movement of the watch consists of 345 parts and offers 50 hours of power reserve. Each Zalium cased watch takes more than 160 hours to build. Just 20 will be produced. For a better look, watch this video.

Founder and editor-in-chief of ATimelyPerspective.com, Roberta Naas is a veteran award-winning journalist in the watch industry with more than 25 years of experience. She was the first woman watch editor in the US market—breaking in to an “all boys network” with a pioneering spirit that would be her signature to this day. Naas brings responsible, factual—yet always timely and insightful—reporting of the watch industry to the forefront.