Introducing the Great White – DOXA SUB 250T GMT ‘Great White’ Topper Edition

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The DOXA SUB 250T GMT ‘Great White’ Topper Edition is a compact, focused travel-dive instrument that leans heavily into Topper Jewelers’ established Great White design language while refining it around the newer 40 mm SUB 250T platform. It brings together a fully luminous, high-contrast dial, a proper dual‑time capability and a serious dive bezel in a package that still feels resolutely DOXA.

This edition picks up the narrative begun by Topper’s 2024 Great White collaboration and transposes it onto the SUB 250T GMT architecture introduced at Geneva Watch Week 2025. The watch pays tribute to the Great White sharks of the Gulf of the Farallones off the Northern California coast, a theme underscored by a special caseback engraving depicting the San Francisco Bay Area relative to the Gulf. Built as an “adventure‑ready” companion, it offers proper multi‑time‑zone tracking and 250‑metre water resistance while limiting production to 100 numbered pieces.

The Great White

The most striking element remains the fully luminous dial, executed with Super‑LumiNova BGW9 that emits a blue glow, effectively turning the entire dial surface into a light source in low light. In bright conditions, the “Great White” concept comes across through the clean white dial contrasted by navy blue elements, while in darkness the high‑contrast execution maximises legibility with clearly separated handset and markers.

The layout follows the familiar SUB vocabulary, here adapted to a GMT without a date, a conscious choice to preserve the characteristic asymmetry of the SUB dial while also allowing an unbroken luminous field. Hour markers and hands are finished in blue lacquer, creating a chromatic pairing with the navy accents on the bezel and providing a crisp visual hierarchy between time‑telling and GMT indications. The printing is kept functional, avoiding visual clutter so that the fully lumed surface and bold markers remain the focus.

Movement: construction, decoration and specifications

Inside ticks a Swiss‑made automatic movement configured with central hours, minutes, running seconds and a 24‑hour hand for second time‑zone indication. The calibre runs without a date, with the date click removed at the movement level rather than simply masked, a detail that reduces phantom crown positions and unnecessary components under the dial. The power reserve is rated at 50 hours, which suits the watch’s role as a modern daily‑wear travel diver by offering a comfortable margin when rotated within a modest collection.

The technical proposition is straightforward: an automatic GMT movement tuned for reliability and ease of use, with a 24‑hour hand that allows simultaneous reading of local and home time. DOXA does not foreground haute horlogerie decoration here, as the watch uses a closed steel caseback, so any finishing is primarily functional: robust bridges, reliable automatic winding architecture and shock protection aimed at sustained use in and out of water. In context, this is a tool GMT where the specification sheet is geared toward accuracy, autonomy and serviceability rather than display‑case embellishment.

Classic DOXA

The SUB 250T GMT ‘Great White’ Topper Edition uses a 316L stainless‑steel case measuring 40.00 mm in diameter with a compact 42.90 mm length, resulting in a footprint that should suit a broad range of wrists while retaining the dense, purposeful feel associated with DOXA divers. The case is brushed throughout, favouring a utilitarian finish that hides wear gracefully and aligns with the watch’s professional diving intent. Water resistance is rated to 250 metres, supported by a screw‑down construction and a flat, anti‑reflective sapphire crystal that nods to the 1968 DOXA original while delivering contemporary durability.

The unidirectional bezel is a key part of the identity: a classic DOXA profile with deep sawtooth edges for secure grip, even with gloves, and dual scales to calculate both elapsed dive time and “no‑stop” decompression limits in accordance with US Navy tables. Engravings on the bezel are filled with navy‑blue lacquer, tying in visually with the dial’s hour markers and providing excellent contrast against the steel. The solid caseback in stainless steel features original artwork specific to this Topper edition, showing the San Francisco Bay Area in relation to the Gulf of the Farallones, combined with individual limited‑edition numbering.

On the wrist, the watch is delivered on DOXA’s familiar “beads‑of‑rice” stainless‑steel bracelet, which includes a folding clasp with a foldout extension for quick adjustment over a wetsuit. The lug width is 18 mm, and the package is completed by an additional integrated navy‑blue FKM rubber strap with a stainless‑steel folding clasp, reinforcing the watch’s amphibious character and giving the owner two distinct wearing experiences out of the box.

Ending and conclusion

This SUB 250T GMT ‘Great White’ Topper Edition is not only a stylistic continuation of Topper’s Great White narrative but also a refinement of it, concentrating the concept into a more compact, travel‑ready platform with a fully luminous, no‑date dial. The watch offers a coherent package: a functional GMT movement, serious dive credentials, and an aesthetic that connects the Pacific’s deep navy and the white of its apex predator, while the charitable link to the Greater Farallones Association adds a broader environmental dimension to the project. Limited to 100 pieces at a price of 2,990 USD, it sits squarely in the sweet spot for enthusiasts who want a distinctive, usable GMT diver that still feels authentically DOXA and meaningfully tied to the California coast and Topper’s community.

DOXA SUB 250T GMT ‘Great White’ Topper Edition Technical Specifications

Ref. 821.10.011.10 – Limited edition: 100 individually numbered pieces, 2,990 USD

Movement

• Type: Swiss‑made automatic movement​
• Functions: Hours, minutes, seconds, 24‑hour hand and second time‑zone indication; no date​
• Power reserve: 50 hours

Case

• Material: 316L stainless steel, brushed
• Diameter: 40.00 mm​
• Length (lug‑to‑lug): 42.90 mm​
• Water resistance: 250 m / 820 ft
• Caseback: Stainless steel, original “San Francisco Bay / Gulf of the Farallones” artwork and limited‑edition engravings​
• Bezel: Unidirectional rotating bezel with dual dive scale
• Crystal: Flat sapphire crystal with anti‑reflective coating

Dial and hands

• Dial: Fully luminous dial with Super‑LumiNova BGW9, blue emission
• Markers and hands: Blue lacquer hands and hour markers
• Display: Hours, minutes, central seconds, 24‑hour hand for second time zone; no‑date execution (date click removed)

Bracelet and strap

• Bracelet: Stainless‑steel “Beads‑of‑Rice” bracelet with folding clasp and wetsuit extension
• Additional strap: Integrated navy‑blue FKM rubber strap with stainless‑steel folding clasp (included in box set)
• Lug / buckle width: 18 mm