Harry Winston HW4702

The HW4702 is a manual-winding caliber from Harry Winston and part of the HW4700 family. It contains 673 components and 95 jewels, beats at 21,600 vph (3 Hz), and delivers a 55-hour power reserve from its coaxial barrel system that completes one rotation every 3.2 hours. The movement's defining feature is its four tourbillons, each rotating counterclockwise in 36-second cycles—a signature element of the Histoire de Tourbillon 10. Measuring 45.0 x 32.0mm, the caliber is housed in a 53.3 x 39.1mm case and was produced in limited numbers for this high-complication collection.