Hublot Classic Fusion Chronograph

About this reference

The Hublot Classic Fusion Chronograph 521.NX.1171.RX is a core component of the brand’s contemporary catalog, having remained in steady production since the early 2010s. Collectors evaluate this reference based on its 45mm Grade 5 titanium case, which offers a high strength-to-weight ratio and a more muted aesthetic compared to the brand's Big Bang series. It utilizes the HUB1143 caliber, an automatic movement based on the ETA 2892-A2 with a Dubois-Dépraz chronograph module, providing a 42-hour power reserve. The dial features a symmetrical bi-compax layout with a date window at six o'clock. On the secondary market, this reference typically trades between $6,000 and $8,500 depending on condition and inclusion of original documentation. A notable production variant is the "Racing Grey" edition, which replaces the standard matte black dial with a sunray-finished grey surface, often commanding a slight premium.