Hbf Factory V2 Version Hublot Big Bang Courageous and Fearless Chronograph, referred to as HUB, features the Big Bang elements. The case is made of imported 316 stainless steel, showcasing an explosive design. It is equipped with the modified 7750 HUB1242 automatic movement, enabling instant chronograph activation and one button flyback, perfectly replicating the original functionality. The watch also includes a secondary weight for enhanced stability and an ultra low repair rate. The strap is made of natural rubber for exceptional water resistance, softness, and comfort. The crystal is crafted from natural sapphire glass, ensuring it is wear resistant, scratch resistant, and flawlessly transparent. As a young brand, Hublot injects youthful vitality into high end manufacturing with its bold personality and unique designs, inviting everyone to experience the freedom of youth together.