Steel band with adhesive tape buckle OMEGA Omega SEAMASTER Deep Sea series Ocean Cosmos 300 meters 300m coaxial - Ultra Precision Quartz Chronometer 42mm 42mm diving watch 210.30.42.20.01.001 Steel brushed finish case with local polished bezel. Bezel made of black ceramic, decorated with white enamel diving scale. Dial scale not prone to wear or fading. Ratchet-type chronograph bezel rotates counterclockwise in one direction. Curved sapphire crystal mirror coated with anti-glare film. Polished black ceramic dial, laser engraved wave pattern, 6 o'clock position has a calendar window, hollowed-out hands and embossed hour hands treated with rhodium plating and coated with Super-LumiNova night light coating. Green night light of the minute hand cooperates with the green night light of the bezel for use in diving oxygen countdown. Multiple waterproof screw-in crown. Can be worn when diving into the sea. Conical-shaped helium release valve, wave-shaped edge design. Transparent case back with clear view of the movement running state. Replicating 8800 movement. Steel brushed finish strap. Straps can be detached in the same way as the genuine product, with two screws on both sides and a separate fixed rod design in the middle. Fold-over double snap. Pressing the strap can fine-tune the extension. Suitable for wearing during deep diving suits. Diameter 42mm.

N1Factory1-1 is the exclusive product independently developed by N1 Factory. Its 9900 movement functions are exactly the same as the original one. The 12-hour chronograph and 60-minute chronograph are displayed on the 3 o'clock position dial. 1: The ceramic dial of the new Aquanaut 300M has distinct lines and a bright luster. The original one has the same fine sanding lines and won't have any broken lines. The original conical exhaust valve and the turning sound of the bezel are crisp and smooth. 2: The sanding lines of the case are consistent with the original one without any broken lines. The original conical exhaust valve and the turning sound of the bezel are clear and smooth. 3: The scale and characters on the ceramic ring are made by the "white enamel" process. They are not prone to yellowing and can maintain pure white and luster for a long time. The font is brighter. 4: Each grain of the 9-jewel stainless steel strap needs to be polished precisely to ensure no assembly errors. The movable head strap is more comfortable to wear. The extended movable clasp is more user-friendly and can be interchanged with the original one.