Oyster Perpetual Series M277200
Integrated middle case, screw-down case back and winding crown; Screw-down structure: Double-lock double waterproof system, tightly screwed onto the case, making it more waterproof. Sapphire anti-scratch blue crystal is adopted. The color of each dial is adjusted individually to achieve zero color difference. The hour markers are polished, with top-grade Swiss super ice blue lume, fine bottom texture, and color matching. It is equipped with an imported movement, which performs exceptionally well, is precise and durable, and is absolutely reliable.