The Omega Seamaster Diver 300M Co-Axial Chronometer Ref. 212.30.41.20.01.003 is a distinguished modern dive watch that combines professional-grade functionality with a refined, stealthy aesthetic . This particular example is presented on a factory black nylon strap, which offers a lightweight, sporty alternative to the standard steel bracelet, and is secured by an Omega deployant clasp, ensuring both comfort and a secure, adjustable fit on the wrist. Its robust 41 mm stainless steel case houses a striking black dial that pairs with a matching black unidirectional ceramic bezel, offering exceptional durability and a cohesive, tool-watch character . The matte black dial, featuring luminescent skeleton hands and dot and index markers, ensures optimal legibility in all conditions, complemented by a practical date window positioned at 3 o’clock . At its heart beats the self-winding Omega Calibre 2500, a chronometer-certified Co-Axial movement renowned for its precision and reliability, delivering a robust 48-hour power reserve . True to Omega’s dive watch heritage, the watch is equipped with a helium escape valve at 10 o’clock, designed to protect the timepiece during professional saturation diving, and offers a water resistance of 300 meters (30 bar) . Protected by a scratch-resistant, domed sapphire crystal with anti-reflective treatment on both sides, this Seamaster Diver 300M in its factory nylon and deployant configuration offers a unique blend of iconic design, technical sophistication, and versatile comfort that distinguishes it as a highly desirable modern classic . Key specifications: 41mm stainless steel case; black ceramic bezel; black dial with luminescent hands and markers; Omega Calibre 2500 self-winding movement; 48-hour power reserve; factory black nylon strap with Omega deployant clasp; 300m water resistance; sapphire crystal with anti-reflective treatment.