World’s first belt-driven transmission

In a world first, TAG Heuer’s award-winning team of watch masters and engineers replaces the pinions and wheels of the traditional mechanical movement with a belt-driven transmission: a high-yield relay of 5 notched micro drive-belts whose tension is controlled by 2 turnbuckles. The transmission belts are roughly the same size as a single human hair (0.07mm), making them 10 times smaller than any belt ever manufactured.