Doxa

Aquamarine

Reference Number :

840.10.241.25

Series : SUB 300T

Retail: $1,950

(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 TakeForget subtle hues, the SUB 300T Aquamarine bursts onto the scene like a tropical reef revealed by the morning sun. This isn't your grandfather's muted diver; it's a vibrant declaration of capability wrapped in 316L steel armor. That electric blue dial isn't just for show – though it certainly turns heads – it's a beacon of clarity against the deep. You feel the solid heft, the precise click of the iconic no-deco bezel (marked in feet, a nod to its heritage), and know this watch means business down to 1,200 meters. The automatic movement hums reliably inside, a 38-hour workhorse ready for duty, while the helium release valve whispers tales of saturation dives. Whether clamped onto your wrist with the classic Beads of Rice bracelet or the sporty FKM rubber strap, both featuring that essential wetsuit extension, the Aquamarine is pure DOXA: unapologetically bold, technically sound, and ready to plunge into adventure with a personality as bright as its dial. It carries the Conquistador's legacy with modern muscle.

DescriptionThis timepiece is engineered with a casing constructed from high-grade 316L stainless steel, selected for its superior corrosion resistance and durability. The case dimensions measure 42.50 mm in diameter across the widest point and 44.50 mm lug-to-lug, presenting a substantial profile suitable for its intended underwater applications. Vertical case height is specified at 13.65 mm. Ensuring structural integrity under extreme pressure, the design incorporates a solid stainless steel screw-down case back and a screw-down crown mechanism, contributing significantly to its impressive water resistance rating. This model is certified to withstand hydrostatic pressures equivalent to 120 atmospheres (ATM), corresponding to a depth of 1,200 meters or 3,937 feet. An integrated helium release valve (HRV) is present, a critical feature for saturation diving environments, allowing trapped helium molecules to escape during decompression, thereby preventing crystal displacement. The dial is protected by a scratch-resistant sapphire crystal, treated with an anti-reflective coating to enhance legibility by minimizing glare under various lighting conditions, including direct sunlight and underwater environments.

Functionality is centered around a Swiss-manufactured mechanical movement featuring automatic self-winding capabilities. This movement operates at a frequency of 28,800 vibrations per hour (4.0 Hz), a standard rate for modern mechanical watches, balancing accuracy and longevity. The fully wound mainspring provides a power reserve of approximately 38 hours. As per DOXA's specifications, the movement receives decorative finishing. Time indication is provided through central hour, minute, and second hands, supplemented by a date display complication. Facilitating dive time management, the watch includes a patented unidirectional rotating bezel, calibrated in feet. This bezel incorporates an integrated no-decompression dive time calculator, a hallmark feature of Doxa dive watches. Visibility in low-light conditions, essential for diving, is achieved through the application of Super-LumiNova luminescent material on all critical dive-related elements, including hands and dial markers. The lug width measures 20.00 mm, accommodating either a 316L stainless steel "Beads of Rice" style bracelet or an FKM rubber strap. Both options are equipped with a folding clasp that includes a ratcheting wetsuit extension, allowing for easy adjustment over a dive suit. The dial itself is presented in the brand's iconic style, specific to this reference in the Aquamarine colorway.

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