Doxa

Sea Emerald

Reference Number :

840.10.131.10

Series : SUB 300T

Retail: $1,990

(As of: 05/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Doxa. If you are interested in selling this watch to us, you can contact us here.

Quick TakeTalk about a watch that just screams deep-sea charisma! The DOXA SUB 300T Sea Emerald isn't messing around. That vibrant sunray green dial catches the light, promising adventures beneath the waves, while the specs back it up completely. We're talking a serious 1200 meters of water resistance – more than enough for any recreational diver and frankly, most professionals too. The cushion case, pure 316L steel, feels robust, ready for action, and that famous DOXA unidirectional bezel with the no-decompression scale (in feet, mind you) is right there for timing your dives. Inside, a reliable Swiss automatic movement keeps things ticking accurately with a 38-hour power reserve. It’s even got a helium release valve, a nod to its saturation diving heritage echoing the original Conquistador. Then there's the comfort factor – that classic "Beads of Rice" bracelet is legendary for a reason, plus it has that essential wetsuit extension. It’s a tool watch, absolutely, but with a personality as deep and captivating as the ocean depths it's built to explore.

DescriptionThe timepiece designated as Reference 840.10.131.10, known commercially as the Doxa SUB 300T Sea Emerald, operates via a Swiss mechanical automatic movement. This self-winding caliber maintains a power reserve of approximately 38 hours and oscillates at a frequency of 28,800 vibrations per hour (4.0 Hz). Internal mechanism components feature decoration applied by DOXA. Timekeeping indications encompass hours, minutes, and central seconds, supplemented by a date display function. The operational integrity is secured by a screw-down winding crown and a solid, screw-down case back constructed from stainless steel.

Fabricated from high-grade 316L stainless steel, the case structure presents dimensions of 42.50 mm in diameter and 44.50 mm lug-to-lug, with a total height measurement of 13.65 mm. Engineered for saturation diving applications, the case incorporates a helium release valve (HRV) and provides substantial water resistance rated to 120 atmospheres (ATM), equivalent to a depth of 1,200 meters or 3,937 feet. Protecting the dial is a scratch-resistant sapphire crystal treated with an anti-reflective coating to enhance legibility. A key functional element is the patented unidirectional rotating bezel, calibrated in feet and featuring an integrated no-decompression dive time calculator. Luminescent material (Super-LumiNova) is applied to critical dive-relevant elements on the dial and bezel to ensure visibility in low-light underwater conditions. The connection interface for the bracelet measures 20.00 mm in width. The bracelet itself is composed of 316L stainless steel in the "Beads of Rice" style, secured by a folding clasp equipped with a ratcheting wetsuit extension mechanism and adorned with the DOXA fish symbol. A NATO strap option with a pin buckle and quick-release spring bars is also noted. The dial presentation is characterized by a sunray finish in the designated Sea Emerald colorway. This model serves as a modern interpretation drawing inspiration from the historical 1968 SUB 300T Conquistador.

GenderMen

SignaturesDOXA

Country of OriginSwitzerland

Case Size42.5 mm

MovementAutomatic

FunctionsHours, Minutes, Seconds, Date

Power Reserve38 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSolid

CrownScrew Down