In-Depth Does The Tourbillon Have Any Real Benefits In A Wristwatch?

The space issue is perhaps less urgent in a pocket watch, but in a wristwatch, the tourbillon really starts to hog available space; building a tourbillon into a 50mm or larger pocket watch is one thing, but fitting one into, say, a 30mm diameter watch movement is another There were certainly tourbillon wristwatches built in the days before the post-quartz luxury watch boom, but they were very few in number - Patek Philippe made several wristwatch tourbillons for the observatory trials, as did Omega, but these are rarities, and the search for winning timekeeping solutions in the observatory trials was largely taken up with refining the lever escapement watch, and improving fine adjustment techniques Audemars Piguet's ultra-thin tourbillon watch, caliber 2780, from 1986, was intended as a demonstration of tour de force watchmaking prowess, not a serious contribution to precision timekeeping. Source