This Hublot Big Bang in reference 645.JM.0120.RT centers on a 42mm case fitted with a screw-locked crown and rated to 30 meters of water resistance. The rubber strap fastens via a folding clasp, keeping the wrist feel sport-ready while complementing the bold proportions of the Big Bang silhouette.
At the heart of the piece is an automatic movement laid bare by a skeleton dial — an open-worked design that draws the eye directly to the rotating components beneath the crystal. No additional complications interrupt the view, letting the movement itself serve as the focal point.
The rubber strap and folding clasp combination underscores the Big Bang's athletic character, while the skeleton treatment gives the 645.JM.0120.RT a distinctly technical and visual appeal well suited to enthusiasts who appreciate mechanical transparency in a bold 42mm package.
