Hbf Factory V2 Version Hublot Big Bang Unwavering Courage Chronograph, abbreviated as HUB. The Big Bang chronograph V2 features a case made of imported 316 stainless steel, showcasing an explosive design. It is equipped with the modified 7750 HUB1242 automatic movement, offering instant start timing and a one button flyback function, perfectly replicating the original features. The second weight automatic rotor enhances stability and achieves an ultra low repair rate. The watch is made with natural rubber from oak trees, providing exceptional waterproof capabilities, while remaining soft and comfortable. The crystal is crafted from natural sapphire glass, ensuring it is scratch resistant, durable, and flawless. As a young brand, Hublot redefines youthful energy with its bold personality and unique designs in high end manufacturing, inviting everyone to experience the freedom of youth together.