The Hublot V4 upgrade comes with the following enhancements: It utilizes an original casing for the mold shell, eliminating the use of plastic for the side ears. The upgraded true tourbillon movement strengthens shock resistance and addresses issues seen in regular market versions, such as poor stitching and high movement repair rates. It achieves a 90% restoration of the original structure, with a 1:1 size ratio, laminated sapphire crystal watch face, and matching rubber-backed leather strap, highlighting its superior quality compared to smaller manufacturers.The specific selling points can be summarized into six high elements:.1. High-precision true tourbillon movement, offering both premium quality and stability.2. High-quality seamless stitching at the bezel, case, and case back, with steel construction for the side ears, distinguishing it from plastic alternatives in the market.3. High restoration rate, achieving 90% resemblance to the original structure with a 1:1 size.4. High shock-resistant movement enhanced for durability, resulting in an exceptionally low repair rate.5. High-strength lens featuring scratch-resistant sapphire and polyethylene explosion-proof film, capable of withstanding strong impacts.6. High aesthetic appeal with a cool and impressive design, fully skeletonized movement, and an abundance of mechanical gear aesthetics.The Hublot Big Bang men's series watch is truly worth having.