The Yangtze Jiangtun Limited Edition is a purpose-driven diver's watch created to support the conservation of the critically endangered Yangtze finless porpoise. Built with high-performance marine utility in mind, it features a multi-piece stainless steel case with a tungsten minutes scale top ring and a generous 43.50 mm diameter, protected by a domed anti-reflective sapphire crystal. At its heart lies the automatic Oris Caliber 733-1 movement, operating at 28,800 A/h (4 Hz) to deliver precise central timekeeping, fine timing, stop-second functionality, an instantaneous date display with corrector, and a 41-hour power reserve. Boasting an impressive 30 bar water resistance, a stainless steel bracelet, and a special engraved case back, this limited-edition timepiece perfectly blends modern Swiss engineering with environmental purpose.