Doxa

Aquamarine

Reference Number :

855.10.241.10

Series : SUB 250T GMT

Retail: $2,490

(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 just telling time; the DOXA SUB 250T GMT Aquamarine is about conquering it, wherever you roam. That bright Aquamarine dial isn't just pretty; it's a beacon of adventure, housed in a tough-as-nails 40mm steel case ready for anything from boardroom battles to coral reef exploration. Peeking beneath that nigh-invulnerable sapphire crystal, you've got a Swiss automatic heart beating at a swift 4 Hz, keeping things precise whether you're timing a dive with the unidirectional bezel (marked in feet, naturally) or catching a connection across continents. Speaking of continents, the skeletonized GMT hand is your trusty co-pilot for tracking home time while you're out chasing horizons. With 250 meters of water resistance thanks to the screw-down crown and case back, it laughs off deep dives. Strap it on with the classic 'beads of rice' bracelet or the comfy FKM rubber – both featuring that slick ratcheting dive extension clasp. It’s pure, functional cool; a blend of vintage dive vibes and modern globetrotting utility that just works.

DescriptionThe timepiece designated SUB 250T GMT Aquamarine, reference number 855.10.241.10, incorporates a robust stainless steel housing engineered for underwater applications and multi-time zone functionality. Dimensional specifications measure 40.00 mm in diameter, extending to 42.90 mm lug-to-lug, with a vertical profile height of 10.85 mm. Security against water ingress is achieved through a screw-down crown mechanism and a solid, screw-down stainless steel case back, collectively ensuring hydrostatic pressure resistance equivalent to 25 atmospheres, translating to 250 meters or 820 feet of water depth. A key functional element for dive time management is the unidirectional rotating bezel, calibrated with markings in feet, designed to prevent accidental counter-rotation which could overestimate remaining dive time. Protecting the dial assembly is a sapphire crystal, selected for its high scratch resistance relative to other transparent materials, further enhanced with an anti-reflective coating to maximize light transmission and reduce glare, thereby optimizing legibility under diverse ambient lighting scenarios. The integration of these features produces a case assembly suitable for demanding aquatic environments while maintaining dimensions conducive to versatile wearability. Lug width is specified at 18.00 mm, dictating the interface point for strap or bracelet attachment.

Internal operation relies upon a Swiss-manufactured mechanical movement featuring an automatic, self-winding system. This caliber operates at a frequency of 28,800 vibrations per hour (4.0 Hz), a rate conducive to stable timekeeping performance. Fully wound, the mainspring provides a power reserve autonomously sustaining operation for approximately 50 hours. Doxa applies proprietary decoration to the movement components, although the specific nature of this decoration is not detailed beyond its existence. Time indication includes central hours, minutes, and sweeping seconds hands. A date complication is presented, alongside a dedicated 24-hour skeletonized hand facilitating the tracking of a second time zone (GMT function). Legibility is supported by the iconic DOXA dial design in the Aquamarine colorway. Attachment options cater to user preference and application: a stainless steel "Beads of Rice" bracelet or a color-coordinated FKM rubber strap. Both options are equipped with a folding clasp incorporating a practical ratcheting extension system, allowing for rapid adjustment to accommodate wear over a wetsuit sleeve without requiring tools. The combination of the high-frequency GMT movement, substantial water resistance, and secure clasp system underscores the instrument's design intent for global travel and underwater use.

GenderMen

SignaturesDOXA

Country of OriginSwitzerland

Case Size40 mm

MovementAutomatic

FunctionsHours, Minutes, Seconds, Date, GMT

Power Reserve50 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSolid

CrownScrew Down