Harry Winston Histoire de Tourbillon 10

For the first time ever, Harry Winston uses four distinct tourbillons in a Histoire de Tourbillon creation Arranged in perfectly symmetrical order, the four independent, adjacent cores rotate in 36 seconds, their high-precision steps unified by a series of three differentials Together, they make Histoire de Tourbillon 10 a timepiece dedicated to superlative chronometry, with a unique design. Source