Sub 600T PacificLimited / 600 pieces, 2023

The Sub 600T is DOXA's answer to a specific question: how deep can a production diver go under the DOXA brief? At 600 meters, it sits above the recreational tier and into saturation territory, with a helium escape valve to prove it. This is the ref for buyers who want the full depth specification alongside the orange dial that made the brand.

What it is

DOXA introduced the Sub in 1967 and quickly became the reference point for purpose-built dive watches aimed at working divers rather than collectors. The T-graph bezel, designed to calculate safe ascent rates, separated DOXA from the crowded field of simple countdown bezels. The 600T extends that original brief upward in depth rating, targeting professional and saturation dive use cases that the Sub 300 and 300T could not cover.

The helium escape valve is functional here, not decorative, reflecting the watch's intended context. DOXA relaunched as an independent brand in 2020, and the 43mm 600T entered production in 2023 as part of that repositioning toward serious collector and professional credibility.

Buying notes

The 43mm case wears large and the lug-to-lug dimensions deserve attention before purchase, particularly for smaller wrists used to vintage-sized divers. The orange dial is polarizing; buyers drawn to DOXA for its history sometimes discover in person that the color reads louder than photographs suggest. The ETA 2824-2 is a competent movement but unremarkable at this price point, and some buyers expect more at the 600T tier.

Early post-relaunch production occasionally showed inconsistent bezel click feel; later examples (mid-2024 onward) are tighter. Verify the helium escape valve crown threads smoothly before accepting delivery, as this is the most reported service touchpoint on used examples.

Market read

New, the 600T Pacific trades at a premium over the Sub 300T, reflecting the depth rating and helium escape valve. The grey market has settled; discounts exist but are modest given production volumes. Orange dial commands stronger resale than black due to collector preference for the historically correct color.

Resale liquidity is decent within the DOXA enthusiast community but thin outside it, so buy this because you want it, not as a value play.

Service expectations

The ETA 2824-2 is one of the most widely serviced movements in the world, and any competent watchmaker can handle a full service. Recommended service interval is four to five years given the dive-rated gaskets, which degrade on a different schedule than the movement. Pressure-test the case before and after any service that requires opening the case back.