Doxa

Searambler

Reference Number :

840.10.021.20

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 TakeSlipping the DOXA SUB 300T Searambler onto the wrist feels like shaking hands with diving history itself. That unmistakable silver Searambler dial isn't just easy on the eyes; it’s a beacon of legibility, designed to shine whether catching the sun topside or reflecting your dive light in the deep. The watch has serious heft, thanks to the solid 316L steel construction, feeling less like jewelry and more like a purpose-built submersible tool that just happens to look incredibly cool. Knowing it can handle pressures down to 1,200 meters and packs a helium release valve gives it an aura of quiet confidence – it’s over-engineered in the best possible way. Clicking the unique no-deco bezel around is pure tactile joy, a reminder of its life-saving function for divers pushing limits. And the choice between the slinky, vintage-vibe "Beads of Rice" bracelet or the tough FKM rubber, both with that essential ratcheting clasp, means it adapts perfectly from wetsuit to business suit (if you dare). This isn't just a watch; it’s a mechanical companion with stories baked into its very design, ready for adventures far below the waves or just navigating the everyday.

DescriptionManufacturing specifications for the reference 840.10.021.20 SUB 300T Searambler detail a primary construction utilizing 316L stainless steel, selected for its high resistance to corrosion, particularly in saline environments, and its hypoallergenic properties. This material forms the entirety of the watch case structure, measuring 42.50 millimeters in diameter across the cushion shape and extending to 44.50 millimeters in lug-to-lug distance, ensuring a significant wrist presence while maintaining wearability. The overall vertical profile is registered at 13.65 millimeters in height. Protection for the dial is provided by a scratch-resistant sapphire crystal, which further benefits from an anti-reflective coating applied to minimize glare and maximize legibility across diverse ambient lighting scenarios, from direct sunlight to the low-light conditions encountered underwater. Structural integrity necessary for extreme depth operations is reinforced by the implementation of a screw-down crown mechanism and a solid 316L stainless steel screw-down case back. These elements are crucial contributors to the timepiece's substantial water resistance rating. The lug width specification is precisely 20.00 millimeters, standardizing compatibility with alternative strap options. The timepiece's architecture explicitly includes an integrated helium release valve (HRV), a specialized component indispensable for professional saturation diving, automatically facilitating the expulsion of trapped helium gas molecules during decompression phases to prevent crystal dislodgement due to internal pressure build-up. This model serves as a direct functional and aesthetic descendant of the historically significant 1968 Doxa SUB 300T Conquistador, which pioneered the inclusion of the HRV in a commercially available dive watch, blending this heritage with contemporary engineering tolerances and material advancements for enhanced performance and reliability under pressure. The formidable water resistance is certified to 120 bar, translating to an operational depth capability of 1,200 meters or 3,937 feet, classifying it unequivocally as a professional-grade diving instrument designed for challenging underwater exploration and work environments.

Powering the SUB 300T Searambler is a Swiss-manufactured mechanical movement operating on an automatic, self-winding principle, harnessing the kinetic energy generated by the wearer's motion to tension the mainspring. This caliber exhibits a precise operational frequency of 28,800 vibrations per hour (equivalent to 4.0 Hz), a rate conducive to both stable timekeeping accuracy and a visibly smooth sweep of the central seconds hand. When fully wound, the movement provides a power reserve autonomously for approximately 38 hours. As specified by the manufacturer, the movement incorporates decorative finishing executed by DOXA. Time indication is conveyed through central hour, minute, and seconds hands, supplemented by a date complication displayed via an aperture integrated into the dial face. The watch prominently features the "Searambler" variant dial, characterized by its distinct silver colorway. Readability in abyssal or low-light conditions is paramount, addressed through the strategic application of Super-LumiNova® luminescent compound to the hands and hour markers, ensuring critical time and dive-related information remains clearly visible. A defining functional element is the patented unidirectional rotating bezel, engineered as a safety measure to rotate only counter-clockwise, preventing accidental underestimation of dive time. This bezel integrates DOXA's renowned no-decompression dive time calculator, calibrated in feet, enabling divers to align the bezel with the minute hand to monitor bottom time against established no-stop limits for various depths. Key indices and the primary zero marker on the bezel are also treated with Super-LumiNova® for optimal underwater legibility. The reference is supplied with attachment options including a 316L stainless steel bracelet executed in the classic "Beads of Rice" configuration, lauded for its flexible comfort and vintage aesthetic. This bracelet is equipped with a secure folding clasp, distinctly marked with the DOXA fish emblem, and incorporates a user-friendly ratcheting wetsuit extension mechanism, allowing for rapid micro-adjustments to accommodate the thickness of a diving suit sleeve without tools. Alternatively, an FKM rubber strap option is available, also featuring a robust folding clasp integrating the same practical ratcheting extension system, offering a durable and water-impervious alternative well-suited for aquatic activities.

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