DOXA Sub 300T Professional

SKU AS01790
SKU AS01790

Why We Love it

1943 was the height of World War II, but it was also the year that would forever change the nature of skin-diving, and would serve as the genesis of a classic timepiece design: the diver's watch.

In the icy waters of the Marne River, a young lieutenant in the French Navy by the name of Jacques Cousteau tested a new apparatus that he developed with his colleague, Emile Gagnan. Prior to this year, diving for extended periods was only possible with the aid of long hoses connected to tanks on the water's surface. But Cousteau and Gagnan designed a regulator to emit air at an intake of breath, hooking the regulator to a hose that was connected to two tanks of compressed air that could be strapped to the diver's back.

After a few slight adjustments to the intake and exhaust valves, Gagnan and Cousteau patented their invention, calling it the Aqualung. By 1946 the Aqualung was being sold in France to commercial and amateur divers, and by the 1950s it was available in the US and Great Britain.

The advent of SCUBA made skin-diving as a sport much more accessible to lovers of the sea. Before electronic diving computers, watches were a crucial tool for divers, who required them to calculate dive and decompression times, and they needed specialized, easy-to-read watches. Rolex and Blancpain's iconic dive watches were released during this decade, the Submariner and Fifty Fathoms, and both have become the stuff of legend.

The success of the Submariner and Fifty Fathoms drove DOXA to develop a dive watch of its own. It had to be comfortable, rugged, and above all reliable, with a dial that could easily be read in the murky depths of the ocean.

Research and Development for the Sub 300 began in 1964, under a team helmed by Urs Eschle, the brand's head of operations, who consulted professional divers including the father of SCUBA himself, Jacques-Yves Cousteau.

Since wearability was crucial, Eschle designed a large case with wide rounded lugs. To maximize dial visibility, the team tested many colors in the waters of Lake Neuchatel before deciding on bright orange, a choice that would become the brand's calling card. To further enhance view-ability underwater, they applied an unprecedented amount of tritium on the hands and hour indices. The team also implemented a unidirectional bezel with an innovative insert: the U.S. Navy No Decompression chart, with the outer depth scale in orange and the minute scale in black, to allow divers to gauge how much air was in left in their tanks. This design was entirely new for the era, but is now a required addition to any ISO-rated diver's watch made today.

Rounding out the Sub 300's innovative design was a beads-of-rice bracelet that was the first to implement an ratcheting expandable clasp capable of fitting over a diver's wetsuit without having to remove links.

With the introduction of the Sub 300T in 1968, DOXA initiated subtle changes in the watch's design, including new dial colors, a thicker case and a flatter crystal. The bright orange dial of the Sub 300T Professional remains the most iconic and desirable. 

This particular Sub 300T has one of the strongest cases we've ever seen here at Analog/Shift (and we have seen quite a few). It's quite rare to see one with the original paint so intact on the bezel. The sailing ship on the case back indicates that it's an early example of this classic design--another attractive feature that makes it highly collectible. 

Our Founder has a particular fondness (that's a nice way of saying obsession - JL) for these watches, and in his tenure as a DOXA obsessive he's had only two examples that came with their original papers come through his hands--this is one of them. 

On an early style Expandro beads of rice bracelet, this Sub 300T is perfect for an enthusiast of 1960s divers who desires a collector-grade example of this classic and important diver's watch. 

A:S Guarantee


Our Pledge

Analog:Shift stands behind the authenticity of our products in perpetuity.


Since our pieces are vintage or pre-owned, please expect wear & patina from usage and age. Please read each item description and examine all product images.


We back each Analog:Shift vintage timepiece with a one-year mechanical warranty from the date of purchase.

International Buyers

Please contact us prior to purchase for additional details on shipping and payment options.

Shipping & Returns


All of our watches include complementary insured shipping within the 50 states.

Most of our products are on hand and will ship directly from our headquarters in New York City. In some cases, watches will be shipped directly from one of our authorized partners.

We generally ship our products via FedEx, fully insured, within 5 business days of purchase. An adult signature is required for receipt of all packages for insurance purposes. Expedited shipping is available at an additional cost. We are also happy to hand deliver your purchase in Manhattan or you may pick it up at our showroom.

Returns must be sent overnight or by priority international delivery, fully insured and paid for by the customer. A restocking fee may apply. Watches must be returned in the same condition as initially shipped.

We welcome international buyers, please contact us prior to purchase for additional details on shipping and payment options.

DOXA Sub 300T Professional

DOXA Sub 300T Professional

DOXA Sub 300T Professional


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