Doxa SUB 1500T: The 1,500-Metre Depth-Rating Flagship
The Doxa SUB 1500T is the deepest-diving watch in the current Doxa lineup — rated to 1,500 metres (150 ATM / 5,249 feet) of water resistance, equipped with a helium escape valve, and designed to serve the most extreme end of commercial and saturation diving. It occupies the same territory as Rolex's Sea-Dweller and Omega's Planet Ocean Professional at the very top of the professional dive watch category, but carries it at Doxa's characteristically straightforward price point: USD 2,690 in stainless steel, without the prestige premium of its Swiss competitors.
The SUB 1500T was introduced in 2011, positioning itself as the depth-rating pinnacle of the Jenny family's revived Doxa operation — a direct statement of what the brand that pioneered the commercial helium escape valve in 1969 could engineer in the modern era. Where the SUB 300T inherits the spirit of the original Conquistador at 1,200 metres, the 1500T extends beyond it into territory that only a handful of production watches occupy. The larger 45mm case, the ETA 2892-2 movement, and the integrated HEV mark it as a professional instrument first and a collector object second — though the collector dimension has grown substantially as Doxa's profile has risen among serious watch enthusiasts.
The Case: 45mm, Cushion-Form, Built for Saturation Diving
The SUB 1500T uses a 45mm cushion-case construction in 316L stainless steel — larger than any other model in the current Doxa lineup (the SUB 300 and 300T run at 42.5mm; the SUB 600T at 40mm). At 45mm, the 1500T occupies the same proportional territory as the original 1967 SUB 300, which also launched at 45mm before the modern production settled on 42.5mm. There is a historical resonance in the sizing: the brand's deepest modern diver echoes the dimensions of its founding professional model.
The case is 16.25mm thick — notably stout, reflecting the engineering required to seal a watch to 1,500 metres across crown, HEV, and caseback penetrations — with a lug-to-lug of 47mm. On most wrists, this is a large watch. It is not designed for subtlety. On the wrist of a commercial diver in a dry suit, it is proportional and purposeful.
The unidirectional rotating bezel carries the no-decompression table, consistent with the SUB 300 family. The caseback is screw-down and solid. The crown is screw-down at 3 o'clock. The helium release valve is positioned on the case flank, operating on the same principle as the valve introduced on the SUB 300T Conquistador in 1969: a spring-loaded one-way vent that releases trapped helium during decompression without allowing water ingress.
Movement: ETA 2892-2
Where the rest of the Doxa SUB family runs on the Sellita SW200-1 (a 28,800 vph automatic with 38 hours of power reserve), the SUB 1500T steps up to the ETA 2892-2 . The 2892-2 is a higher-specification calibre from ETA — thinner, with a 42–50 hour power reserve depending on rotor weight configuration, running at the same 28,800 vph frequency but built to a higher finishing standard and with a more sophisticated movement architecture. The 2892-2 was for many years ETA's premier automatic calibre before the development of the 3135 era Rolex movements; it remains a respected and highly serviceable calibre with an extensive history of deployment in professional and tool watch contexts.
The higher movement specification in the 1500T reflects its positioning as the brand's flagship: a watch that justifies a premium movement alongside its premium engineering. At USD 2,690, the 1500T is the most expensive current Doxa in stainless steel (excluding limited editions), and the ETA 2892-2 is an appropriate movement partner for that pricing.
The Doxa Depth Ladder: Where 1500T Fits
Understanding the SUB 1500T requires placing it in the context of the full Doxa SUB depth ladder. Each model addresses a specific professional or recreational diving tier:
| Model | Depth Rating | HEV | Price (USD) |
|---|---|---|---|
| SUB 200 | 200m | No | From $1,490 |
| SUB 300 | 300m | No | From $1,690 |
| SUB 600T | 600m | No | From $1,550 |
| SUB 300T | 1,200m | Yes | From $2,190 |
| SUB 1500T | 1,500m | Yes | $2,690 |
The 1500T's position at the top of the depth ladder makes it the most capable production watch Doxa currently offers. The only models that go deeper are extreme custom or prototype watches outside the production catalog. At USD 2,690 for 1,500 metres of water resistance and a helium escape valve, the 1500T offers a compelling depth-rating-to-price ratio versus Swiss competitors — a 1,500-metre rating from Rolex (DEEPSEA) or Omega (Planet Ocean Ultra-Deep) costs substantially more.
Who Actually Needs 1,500 Metres?
Honest answer: almost no one wearing a consumer wristwatch. The current record for the deepest human dive in a standard suit is approximately 330 metres, achieved by Ahmed Gabr in 2014. Saturation divers operate at depths typically between 100 and 500 metres in commercial operations. ROV-assisted commercial diving pushes deeper, but ROV crews are surface-based. Military diver operations are classified.
The 1,500-metre depth rating on the SUB 1500T is an engineering statement and a collector credential rather than a specification most buyers will operationally require. What the rating does demonstrate is the pressure resistance of the case construction under conditions far exceeding anything a recreational or professional sport diver will encounter — the 1,500m rating provides an engineering safety margin that guarantees reliable performance at depths that do matter. It is also the direct continuation of Doxa's tradition, begun with the 1968 Conquistador, of engineering beyond the evident need.
Introduced: 2011 | Case: 45mm | 16.25mm thick | 47mm L2L | 316L stainless steel
Water resistance: 1,500m (150 ATM) | Helium escape valve: Yes
Movement: ETA 2892-2 automatic | 21 jewels | 28,800 vph | 42–50 hour power reserve
Bezel: Unidirectional, no-decompression table | Crown/caseback: Screw-down
Price: USD 2,690 | Current production status: Active
Frequently Asked Questions
What is the deepest diving watch Doxa makes?
The Doxa SUB 1500T, rated to 1,500 metres (150 ATM) with an integrated helium escape valve. It is the depth-rating flagship of the current Doxa lineup, introduced in 2011, and remains in active production at USD 2,690.
Does the Doxa SUB 1500T have a helium escape valve?
Yes. The SUB 1500T carries an integrated helium release valve (HEV) — the same type of valve Doxa pioneered on the 1969 SUB 300T Conquistador, which was the first commercial dive watch with this feature. The HEV allows helium to escape during decompression without allowing water ingress, making the watch suitable for saturation diving environments.
What movement does the Doxa SUB 1500T use?
The ETA 2892-2 automatic movement, running at 28,800 vph with a 42–50 hour power reserve and 21 jewels. This is a step up from the Sellita SW200-1 used across the rest of the Doxa SUB family, appropriate to the 1500T's flagship positioning.
How much does the Doxa SUB 1500T cost?
USD 2,690 in stainless steel — the highest price point in the current Doxa stainless production catalog, reflecting the 1500T's engineering specification and movement calibre.
Sources: Doxa Watches (doxawatches.com), Time and Tide Watches, Analog:Shift, Fratello Watches, aBlogtoWatch.
