watch to mark a major milestone in Doxa’s storied history: it’s a first for the brand. Doxa unveils the Sub 300T Professional Aristera, the brand’s first automatic dive watch designed for left-handed users, with a crown positioned on the left side of the case.

The Sub 300T remains one of the most iconic models in Doxa’s Sub collection. Launched in 1968, this dive watch became famous not only for its hallmark vibrant orange dial, which ensured superior legibility underwater. Besides its distinctive aesthetics and case shape that made it recognisable immediately, it also impressed with technical innovation.

In addition to the unidirectional bezel for calculating and monitoring no-decompression dive times, it now also featured a helium release valve. This, along with exceptional durability, ensured the model would soon establish itself as a favourite among professional and amateur divers alike.

Today, the Sub 300T Professional Aristera follows through on the brand’s spirit of purpose-designed tool watch innovation with the crown located on the left-hand side of the case. While this inverted configuration, frequently referred to as a ‘lefty’ – because it is specifically designed for left-handed watch wearers – is not a rarity, it is nonetheless uncommon in the marketplace, even more so in the diving watch universe.

While the crown has moved to 9 o’clock, the date window on the Sub 300T Professional Aristera remains at 3 o’clock. To achieve this, the movement had to be rotated 180 degrees inside the case. “This repositioning required technical adjustments and a revision of the final tests,” notes Jan Edöcs, CEO of Doxa.

As the first automatic Sub model to sport a crown on the left side of the case, the Sub 300T Aristera is engineered to provide optimal comfort and ease of use for left-handed wearers.

Hence the name: Aristera, means ‘left’ in Greek, echoing the origins of the brand’s own name – ‘Doxa’ is the Greek word for ‘Glory’.

The Sub 300T Aristera features a bezel with an aluminium insert, paying homage to a design introduced by the Aubry Frères in the 1980s. The choice of metal lends a subtle, elegant matte silver hue. The case itself is carved from a solid block of 316L stainless steel, known for its exceptional corrosion resistance.

Under the scratch-resistant sapphire crystal with anti-reflective treatment, all dive-related indications are coated with Super-LumiNova luminescent material, ensuring excellent readability under low-light conditions and during limited visibility dives.

The power source is a Swiss automatic movement with exclusive Doxa decorations, beating at 28,800 vibrations per hour (4 Hz), and ensuring a comfortable power reserve of about 38 hours. The entire watch is water-resistant to 1,200 meters (approximately 4000 feet), allowing for safe deep-sea exploration.

The Sub 300T Professional Aristera is available exclusively with the Doxa Sub’s iconic orange dial, further enhancing its pedigree. This model comes with both the legendary ‘beads of rice’ stainless steel bracelet to match the case, and a lighter-weight, more casual NATO-style strap. The bracelet and the strap feature respectively a folding clasp with ratcheting wetsuit extension and a pin buckle.

On the caseback, an engraving of a sailing vessel, its sails full – in reverse relief as a nod to left-handed users – along with the inscription ‘Limited Edition XXX/300.’ Beyond its aesthetic appeal and certain collector status, this 42.50 mm diameter watch, worn on land or at sea, maintains its reputation as a timepiece for travellers, adventurers, and globetrotters – left or right-handed, but always sure-handed.