HBF FACTORY V2 Version Hublot HUBLOT Fearless Boldly Striking Abbreviated as HUB Hublot Big Bang Element Material Chronograph V2 Version. The case is made from imported 316 stainless steel, featuring an explosive design. It is equipped with a modified 7750 HUB1242 automatic movement, perfectly replicating the original functions of instantaneous chronograph start and flyback. The second weight automatic rotor enhances stability and achieves an ultra low repair rate. The strap is made from natural rubber, providing excellent waterproofing and a soft, comfortable feel. The crystal is crafted from natural sapphire glass, ensuring durability, scratch resistance, and flawless transparency. As a young brand, Hublot redefines high end manufacturing with its bold personality and unique design, infusing it with youthful vitality and a sense of freedom that resonates with everyone.