Doxa

Sea Emerald

Reference Number :

821.10.131.10

Series : SUB 300

Retail: $2,590

(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 sterile tool watches; the SUB 300 Sea Emerald is pure, unadulterated dive watch charisma with a vibrant twist. That sunray emerald dial isn't just green; it's a shimmering portal to kelp forests and sun-dappled lagoons, catching the light like treasure glinting on the seabed. The classic cushion case hugs the wrist comfortably despite its solid 42.5mm presence, a testament to its 1967 roots, while the high-grade 316L steel promises toughness for real-world adventures. Inside, the COSC-certified heart beats reliably, a reassurance that this beauty is also a precision instrument. Twisting that patented unidirectional bezel, with its distinct dual scale, feels purposeful, connecting you directly to the golden age of scuba. It's not just about telling time; it's about the potential for exploration, whether that's 300 meters down or just navigating the urban sprawl. Strapped on the iconic beads-of-rice bracelet, it's retro-cool perfected; on the NATO, it’s ready for action. This DOXA isn't just keeping time; it’s keeping the adventurous spirit alive, sparkling with emerald energy.

DescriptionThe timepiece designated as Reference 821.10.131.10 features a robust case construction fabricated from high-grade 316L stainless steel. Its dimensional profile measures 42.50 mm in diameter and 45.00 mm lug-to-lug, with a vertical height of 13.40 mm. Engineered for aquatic environments, the case incorporates a screw-down crown mechanism and a solid stainless steel screw-down case back, contributing to a substantial water resistance rating of 30 ATM, equivalent to 300 meters or approximately 984 feet. Protecting the dial is a scratch-resistant sapphire crystal, characterized by a domed profile reminiscent of vintage acrylic crystals but offering superior durability and clarity, further enhanced by an anti-reflective treatment. A defining functional element is the unidirectional rotating bezel, a patented Doxa feature, calibrated in meters. This bezel includes a dual scale indicating dive time in minutes and depth in meters, designed specifically for calculating no-decompression dive limits, adhering to established safety protocols for divers.

Powering the SUB 300 Sea Emerald is a Swiss-made mechanical movement, operating on an automatic self-winding system. This movement has achieved COSC (Contrôle Officiel Suisse des Chronomètres) certification, confirming its status as a chronometer and attesting to its high standards of precision, operational robustness, and sustained reliability under various conditions. The caliber operates at a frequency of 28,800 vibrations per hour (4.0 Hz), contributing to the smooth sweep of the seconds hand and overall timekeeping accuracy. Upon being fully wound, the movement provides a power reserve of approximately 38 hours. Functional indications include central hours, minutes, and seconds, supplemented by a date display located within an aperture at the 3 o'clock position. The movement architecture incorporates decorative elements applied by DOXA. Luminescence is ensured via Super-LumiNova® coatings applied to all essential dive-related indices and hands, maximizing legibility in low-light underwater environments or nocturnal conditions. Attachment options include a stainless steel "Beads of Rice" bracelet featuring a folding clasp equipped with a practical wetsuit extension, or alternatively, a NATO strap secured by a pin buckle and utilizing quick-release spring bars for convenient interchangeability, matching the dial color. The lug width specification is 20.00 mm.

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