In 2025, a brand-new full set of unused Vacheron Constantin with a certificate "Zongheng Sihai Series, Model: 4520V / 210A-B483. The highly popular new model, the Black Steel King of the Four Seas, features a 41mm black dial, luminous hour markers, date display, a fixed bezel, and is crafted from stainless steel. It is equipped with a self-produced 5100 automatic movement with a transparent back, a quick-release stainless steel strap, and is water-resistant to 150 meters. It comes with an original leather strap / adhesive tape folding clasp for replaceable use!