Grade A craftsmanship 2025 new Oyster perpetual series model m277200, 31mm integrated mid-case, screw-down case back and winding crown, screw-down structure, double-locking double waterproof system, tightly secured to the case for enhanced water resistance. Features scratch-resistant blue sapphire crystal, with each color on the dial individually adjusted to achieve zero color difference. Polished hour markers, top-grade Swiss ultra-bright ice blue luminescence, exquisite texture on the background, and color matching; paired with an imported movement known for its outstanding performance, precision, and lasting stability.