The Omega Seamaster Diver 300M Co-Axial Chronograph reference 212.30.42.50.03.001 debuted in 2013, which was before the brand reintroduced the wave dial pattern in 2018. Housed within a 41.5mm stainless steel case, the smooth, lacquered blue dial organizes its readouts through a 30-minute recorder at three o'clock, a 12-hour recorder at six o'clock, and a running seconds subdial at nine o'clock.
Replacing the modified ETA bases of previous references, this model is powered by the Co-Axial Caliber 3330, an automatic column-wheel chronograph movement equipped with an anti-magnetic silicon balance spring. A distinct features is the 10 o'clock helium escape valve, which conceals an integrated push-button date corrector rather than adjusting via the primary screw-down crown.
Founded in 1848 by Louis Brandt in La Chaux-de-Fonds, Switzerland, the company that would become Omega established its identity with the 1894 introduction of the 19-ligne 'Omega' calibre. This movement was a landmark in industrial watchmaking, utilizing interchangeable components to streamline production and repair—a philosophy of accessible precision that continues to define the brand.
Omega cemented its reputation for robust accuracy through its role as the Official Timekeeper for the Olympic Games since 1932 and, most famously, through the Speedmaster Professional's flight qualification by NASA, which culminated in its journey to the Moon.
In the modern era, the brand's most significant contribution has been the industrialization of the co-axial escapement, an invention by Dr. George Daniels that fundamentally reduces friction within the calibre for superior long-term chronometric stability. Typified by purpose-driven design, Omega's collections—from the abyssal-depth Seamaster to the iconic Speedmaster—are archetypes of the professional tool watch, balancing legible aesthetics with advanced material science and anti-magnetic properties through its Master Chronometer certification.
Overall Grade: 8.5 / 10 | Great Condition, Minor Visible Wear Production: 2021 Contents: Full-set Genre: Dive Watch
Size: 41.5mm Thickness: approx. 17mm Lug Width: 20mm
Case: Stainless steel, brushed with mirrored facets, minor visible wear Bezel: Blue ceramic insert, unidirectional, mirrored finish, minor visible wear Dial: Lacquered blue dial, applied markers, lumed Hands: Skeletonized hands, lumed
Crown: Stainless steel, screw-down crown and pushers, minor visible wear Crystal: Sapphire crystal, minor visible wear Bracelet: Stainless steel bracelet, minor visible wear Caseback: Stainless steel, solid, screw-down, minor visible wear Movement: Automatic Chronograph Caliber: Co-Axial 3330