The tape steel belt produced by TT factory has a color of 20, and the upgraded version of the ceramic ring is always genuine. It is highly recommended that the Seamaster series Mi diving watch is the exclusive quality of the entire network. [Movement] Equipped with a brand new Japanese original imported Citizen plus plywood fully automatic mechanical movement. It truly achieves zero repairs, accurate travel time, strong practicality and 100% waterproof. [Glass] High-definition double sapphire glass [Ceramic Ring] Use imported ceramic ring with 12-point sapphire moonlight beads (beautiful/high-end) [Pointer] Super-LumiNova Luminous coating, blue and green two-color luminous, green luminous minute hand display with green luminous dot on the bezel for diving oxygen countdown [literal] corresponds to the seahorse porcelain surface craftsmanship of the counter (visual effect instantly beats ordinary oil pressure) [case] adopts 316L stainless steel watch The case is equipped with the only original ceramic one-way rotating chronograph ring in its class. The pressure relief valve on the side of the case is consistent with the original. The diameter of the watch is 42/11mm, the official perfect size.