Hublot LS.Factory presents the Hublot Big Bang .OM.RX series 20th Anniversary Limited Edition.1. The original version features a new 43mm case, while the market version is 44mm, utilizing the shell of the old .SB.RX model. The two chronograph buttons are more prominent. The non-market version adopts a completely new design with a more ergonomic case and refined case details, featuring larger polished chamfers. The dimensions are 43MM x 15MM, and the 43mm wide case has been meticulously modified to match the original size.2. The calendar has been upgraded; through modifications to the movement, the date window of the replica has been pushed to the edge of the dial, which differs from the ordinary market version's calendar window.3. The sub-dial at the 3 o'clock position has been restored to match the original, featuring a large round dial. In contrast, the ordinary market version's 3 o'clock sub-dial is affected by the calendar window and can only be made as a small round dial.4. Equipped with the HUB automatic mechanical movement, it accurately drives the chronograph function with a 72-hour power reserve, exemplifying the pinnacle of mechanical artistry.5. The strap features a one-click quick-release fluororubber design, allowing for easy style changes while ensuring comfort and a trendy feel. The strap is made from imported fluororubber, providing a more comfortable and better tactile experience.6. The watch face uses sapphire crystal glass, which is transparent and anti-reflective, easily handling everyday challenges.Classic Heritage Innovative Tribute.To celebrate the glorious journey of Hublot over the past 20 years, the BIG BANG series has launched a limited edition commemorative model, blending iconic design with cutting-edge watchmaking craftsmanship to pay tribute to the spirit of breakthrough in this era.