Omega Seamaster Diver 300M – Titanium – Tanatalum – Sedna Gold

The Omega Seamaster Diver 300M – Titanium – Tanatalum – Sedna Gold sweeps asides traditional divers’ watch convention, encompassing a mouthwatering fusion of different materials. This latest timepiece exudes luxury from every facet of its case and bracelet ensemble. Furthermore, this new model from Omega also delivers a range of wearer benefits, ideally suited to life on dry land.

Omega Seamaster Diver 300M - Titanium - Tantalum - Sedna Gold

The days when a mechanical diver’s watch was a necessary utilitarian tool, needed for subaquatic adventure, are now a distant memory. Today, most professional divers favour a suitable wristworn computer, ideally suited for imparting information deep beneath the ocean’s surface. And yet, mechanical divers’ watches are more popular than ever.

This shouldn’t come as a surprise to ardent horophiles accustomed to following the twists and turns of the watch industry. The attributes typically found with divers’ watches, including, robustness, extraordinary water-resistance and peerless legibility, are equally valid on dry land. Moreover, many gentlemen are drawn to the über-masculine styling of many divers’ watches. Ultimately, if today’s divers’ watches sate the desires of landlubbers then, in my opinion, that should be applauded. There is no crime in breaking with tradition or adapting a product’s intended purpose for a new application or environment.

In recent years, the divers’ watch has increasingly become ‘gentrified’. It is no longer essential that a subaquatic timepiece should be made of stainless steel. Clearly, this is an opinion which resonates with Omega, the luxury brand based in Biel/Bienne. It has gained an enviable reputation for making excellent divers’ watches and has not been afraid to embrace titanium or gold for bracelets and cases. While the Swiss marque has subscribed to divers’ watch convention, making time only, three-handers, it has also endowed several models with a chronograph function. Considering that most wearers will limit their adventurous ambitions to pursuits on terra firma, I don’t see why a divers’ watch cannot feature a chronograph function.

Now, the esteemed Maison has unveiled the Omega Seamaster Diver 300M – Titanium – Tanatalum – Sedna Gold. This model exudes luxury from every facet of its case and bracelet ensemble.

Omega Seamaster Diver 300M - Titanium - Tantalum - Sedna Gold

The widespread use of Grade 2 titanium, a hypoallergenic material, should appeal to wearers who suffer an adverse reaction to nickel. Sedna Gold is a proprietary brand of 18-carat gold i.e. 75% pure gold. The additional 25% features copper and palladium, ensuring the appearance of the material does not fade with the onset of years. Tantalum is a rare metal that is hard, light, corrosion-resistant and exhibits an attractive blue-grey hue.

Once again, Omega has created a highly practical watch with a prepossessing appearance. While this timepiece is more than capable of deep-sea use, its suitability for life on terra firma is beyond reproach. Lastly, the Omega Seamaster Diver 300M – Titanium – Tanatalum – Sedna Gold is equipped with the firm’s Calibre 9900, featuring the sublime Co-Axial escapement and delivering impressive levels of precision. Indeed, the movement is a chronometer, certified by the Swiss Federal Institute of Metrology (METAS).

Price: £16,540 (RRP as at 22.9.2020)

The brand’s press release (September 2020)

When tantalum made its OMEGA debut in 1993, it quickly earned a unique place in the Seamaster’s design history. This year, the lustrous material is making a stylish comeback.
Its distinctive blue/grey tones offering a subtle contrast to the precious metals featured prominently on OMEGA’s latest dive watch.

OMEGA’s 44 mm Master Chronometer is a Numbered Edition, made from grade 2 titanium, 18K Sedna™ gold and tantalum – found on the base of the bezel and the middle links of the bracelet.

Omega Seamaster Diver 300M - Titanium - Tantalum - Sedna Gold

The 18K Sedna™ gold bezel ring features a laser-ablated diving scale, while the polished blue ceramic [ZrO2] dial sports laser-engraved waves, a date window at 6 o’clock, and subdial rings with touches of 18K Sedna™ gold. On the side of the case is an 18K Sedna™ gold plate engraved with the watch’s unique number.

Turning the watch over reveals an OMEGA Seahorse, which has been laser-engraved and white lacquered on the sapphire crystal. Through the glass, there is a clear view of the OMEGA Co-Axial Master Chronometer Calibre 9900, certified by the Swiss Federal Institute of Metrology (METAS).

For ocean adventurers, each bracelet includes OMEGA’s patented extendable foldover rack-and-pusher with extra diver extension. The timepiece is water-resistant up to 30 bar (300 m / 1000 ft.) and offered inside a special presentation box in the style of a water-resistant chamber.

A closer look at the materials

Grade 2 Titanium

Discovered in 1794, titanium’s industrialised process only dates back to 1939. Although reasonably common, it remains an expensive metal due to the difficulty linked with its dissociation process from other terrestrial materials. Titanium alloys are light, extraordinarily corrosion resistant, biochemically inert and able to withstand extreme temperatures. Grade 2 titanium is in fact heat-treatable, which means it gains additional strength via the heat-treatment process, making it perfect for moving parts in challenging environments. OMEGA has made use of grade 2 titanium many times in its watchmaking history, on watches such as the Speedmaster X33 – and of course – earlier editions of the Seamaster Diver 300M.

Omega Seamaster Diver 300M - Titanium - Tantalum - Sedna Gold


Tantalum is a lustrous blue-grey metal that is more rare than gold, harder than steel, and highly corrosion-resistant. Its inertness makes it a valuable alternative to platinum. Dark, dense, pliable, and highly conductive of heat and electricity, it is particularly difficult to work with, adding to its rare use within the watch industry. Its name comes from an ancient story in Greek Mythology, in which Tantalus, forced to stand in knee-high water as a punishment, could not drink or reach the fruit above him. This mirrors the attributes of the metal, which cannot absorb acid when immersed. This resistance gives the metal an added robustness and attraction.

Omega Seamaster Diver 300M - Titanium - Tantalum - Sedna Gold

18K Sedna™ gold

In its on-going desire to improve the quality of its products, OMEGA wanted to find a new rose/red 18K gold alloy that would be more resistant to discolouration than the standard 18K red gold used in watchmaking. In 2013, the brand reached its goal. The material dubbed 18 SednaTM gold achieved a beautiful red colour and turned out to have an incredible resistance to discolouration. OMEGA’s own rose gold is an alloy blended from gold (at least 75%), copper for colour and palladium for stability. The result is a unique reddish tone that is warm and particularly long lasting. The unique 18K gold takes its name from Sedna, an orbiting dwarf planet described as one of the reddest in the solar system.

Omega Seamaster Diver 300M - Titanium - Tantalum - Sedna Gold

Further reading


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