Omega Seamaster Planet Ocean 600M Co Axial Master Chronometer 39.5mmvsOmega Seamaster 300

The Omega Seamaster Planet Ocean 600M Co Axial Master Chronometer 39.5mm is praised for its excellent finishing and handsome, easy-to-read dial with good lume. Owners find the 39.5mm size suitable for smaller wrists, though some describe it as a chunky or heavy piece. The Co-Axial movement is noted for potentially increasing service intervals. Opinions are divided on the case proportions, with some finding them strange or awkward due to the 14.5mm thickness, while others appreciate its substantial build and comfortable bracelet with a useful micro-adjust clasp, though one reviewer noted a lack of micro-adjustment on the steel bracelet. The "Summer Blue" dial is considered pretty, and the watch retains its 600m water resistance and helium escape valve. One reviewer found a specific brown ceramic and gold combination visually jarring.

Owners widely praise the Omega Seamaster 300 for its pure design, featuring a sandwich dial and Broad Arrow hour hand, with many calling it their most worn watch and an incredible value. Reviewers note its improved and modernized aesthetic compared to previous models, highlighting its curvaceous look, pronounced sapphire crystal, and scratch-resistant bezel insert. Some owners find the standard color schemes the best value, while others appreciate the timeless appeal of specific dial colors or unique finishes. One owner reports the coaxial 8800 movement runs at approximately 1.2 seconds fast per day per Omega's specifications, though subjectively closer to 0.2 seconds fast. The bracelet's minimal taper and end link design are noted points of contention by one reviewer. On balance, owners and reviewers rate the Omega Seamaster 300 highly for its attractive pure design and exceptional value.