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The Omega Seamaster is, quite simply, the longest-running nameplate in Omega’s catalog, and for good reason. First introduced in 1948 to mark the brand’s centennial, the Seamaster was conceived as a robust, water-resistant watch designed for active lives, drawing directly on case technology Omega had developed for the British military during the Second World War. It was marketed as a watch for “town, sea, and country,” a versatile companion that could transition from the boardroom to the boat deck without missing a beat. By the mid-1950s, the Seamaster had evolved into one of the most successful and recognizable product lines in all of Swiss watchmaking, and the Reference 2846 sits right at the heart of that golden era, bridging the transition from Omega’s early bumper automatics to the modern full-rotor movements that would define the brand for decades to come.
The caliber 490 powering this watch is a historically significant movement, introduced in 1955 as part of a family of new full-rotor automatics designed by Omega’s legendary engineer Edward Black. These calibers, spanning the 470, 490, and 500 series, replaced the older bumper mechanisms that had served Omega since 1943, introducing a 360-degree rotor on ball bearings with bidirectional winding for dramatically improved efficiency. The 490 is a 17-jewel movement with Incabloc shock protection, operating at 19,800 vibrations per hour with an impressive 46-hour power reserve. It features a sub-seconds display at six o’clock, a configuration that gives the dial a more classical, measured rhythm compared to the sweep seconds variants found in the later Cal. 500 and 501. Production of the 470/490/500 family exceeded one million units between 1955 and 1960, a testament to just how successful and reliable these movements proved to be. The movement photo here reveals all the hallmarks of this era’s Omega craftsmanship: the distinctive copper-toned rhodium plating that gives these calibers their warm, rose-gold glow, the fully signed rotor engraved “Omega Watch Co, Swiss, Seventeen 17 Jewels, Unadjusted,” and the clean, purposeful architecture that made these movements beloved by watchmakers and collectors alike.
This particular example is, to us, especially noteworthy for its dial. A sunburst finish on an Omega Seamaster from this period is genuinely uncommon. The vast majority of 2846 dials came in flat silver, honeycomb, crosshair, or gilt configurations, making this radial sunburst execution a standout. The finish catches light beautifully, shifting from a warm champagne to a cooler silver depending on the angle, giving the dial a living, almost liquid quality that flat-finish dials simply cannot replicate. The applied arrow indices are classic Omega design from this period, with their distinctive split-arrow or chevron shape that has become synonymous with 1950s Seamaster design. Each marker retains its original lume fill, which has aged to a warm, creamy hue consistent with seven decades of natural patina. The hands are the proper dauphine style, with the broad arrow hour and minute hands showing a lovely oxidation that speaks to their originality, while the delicate sub-seconds hand sits at six o’clock with its fine crosshair register. “Omega” is printed above the horseshoe logo, with “Seamaster” rendered in that distinctive italic script and “Automatic” set just below, while a subtle “SWISS” sits at the very bottom of the dial. The overall dial tone has developed a gentle warmth over the decades, with minor spotting and patina that only reinforces its authenticity and adds to its visual depth.
The stainless steel case presents with the characteristic “beefy” or “fat” lugs that collectors covet on the 2846, offering a pronounced, downturned lug profile with chamfered edges that gives the watch a surprising amount of wrist presence for its 34mm case diameter. The profile shots reveal a slim, elegant silhouette, with the original Omega-signed crown at three o’clock displaying the horseshoe logo clearly. The case shows honest wear consistent with a watch that has been enjoyed over many decades, with gentle surface scratching on the polished bezel and caseback. Speaking of the caseback, the exterior is engraved “Seamaster” and “Waterproof” without the later seahorse emblem, a detail that places this squarely in the pre-1958 production era. The interior caseback is stamped “Acier Inoxydable, Omega Watch Co, Fab. Suisse, Swiss Made, Patent Applied, 2846-2848, 18G,” complete with multilingual gasket instructions, a charming period detail.
For the collector seeking a truly distinctive entry into the world of 1950s Omega Seamasters, this sunburst-dialed example represents something genuinely special. The combination of the rare dial finish, the historically important Cal. 490 full-rotor movement, and that iconic mid-century Seamaster case design creates a watch with remarkable depth of character. Paired here with an OTTUHR suede strap, it wears with an understated confidence that makes it equally at home with a weekend linen shirt or a weekday suit. These early Seamasters, in our opinion, remain one of the best values in all of vintage watchmaking, offering pedigree, build quality, and design sophistication that punches far above their price point. Finding one with a dial this unusual only sweetens the proposition.
