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The Aquadive GMT diver is listed on the brand’s current product page as the Bathysphere 100 GMT, while its owner’s manual calls it the Bathyscaphe 100 GMT. The title’s Bathyscaphe name therefore refers to the same watch family; use the color and reference details on a specific listing to confirm the exact variant. Aquadive describes a 100-bar automatic GMT with a ceramic timing bezel, but its product page gives conflicting case dimensions and does not establish a current price or availability.
Specifications at a glance
| Specification | Details |
|---|---|
| Brand’s current product-page name | Bathysphere 100 GMT |
| Name in owner’s manual | Bathyscaphe 100 GMT |
| Case dimensions | 42 × 49 × 12 mm in the product page’s “Nitty Gritty” section; the same page’s descriptive text instead says 43 × 49 × 15 mm. Confirm the dimensions for the specific reference with Aquadive. (Aquadive product page) |
| Case material | 316L stainless steel (Aquadive product page) |
| Water resistance | 100 bar, approximately 1,000 m / 3,333 ft (Aquadive product page) |
| Bezel and lume | 120-click unidirectional bezel with ceramic timing ring; Super-LumiNova (Aquadive product page) |
| Movement | Self-winding ETA 2893-2; time, date and second-time-zone functions; 21 jewels; 4 Hz; 42-hour power reserve. Aquadive says the movement is adjusted to five positions and supplied with a certificate. (Aquadive product page) |
| Strap | 22 mm ISOfrane rubber strap with signed pin buckle (Aquadive product page) |
| Production | Limited to 500 pieces per color (Aquadive product page) |
What the name and dimensions mean
The naming differs between Aquadive’s current product listing and the official manual, so buyers may encounter either “Bathysphere” or “Bathyscaphe” when searching. The brand’s listing identifies color variants; check the individual listing or reference before treating a specification or price as specific to a particular color.
Case size deserves extra care. Aquadive’s page presents 42 mm diameter, 49 mm lug-to-lug and 12 mm thickness in its specification section, but its descriptive copy gives 43 × 49 × 15 mm. Those figures cannot both describe the same dimensions consistently. A 2019 Monochrome review reports 43 mm diameter and 15 mm height, aligning with the descriptive copy rather than the specification block; that is a historical independent report, not a resolution from Aquadive. (Monochrome review, 2019)
The difference between 12 mm and 15 mm is meaningful when judging how the watch will sit under a cuff or balance on the wrist. If thickness or diameter is decisive, ask Aquadive to confirm the dimensions of the exact watch being offered rather than relying on a single value copied between listings.
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- 【Premium Automatic GMT Watch】Built around the reliable NH34 self-winding mechanical movement, this 43mm dive watch features an independent 24-hour GMT hand for dual-timezone tracking, 41-hour power reserve, and daily accuracy of -20 to +40 seconds. The dial is finished with a striking sunburst texture and a 3D logo at the 12 o'clock position, elevating the luxury feel.
- 【300M Professional Dive-Ready Build】Crafted from corrosion-resistant 316L stainless steel, this watch is built for underwater performance. It features a scratch-resistant unidirectional rotating ceramic bezel, a screw-down crown, and a screw-on exhibition caseback with sapphire crystal. With a 30ATM water resistance rating, it stands up to swimming, snorkeling, and professional diving activities.
- 【High-Visibility BGW9 Super Luminous】Legibility is key in low-light conditions. The hands, hour markers, and bezel are all infused with Swiss-grade BGW9 Super-LumiNova (not just coated), emitting a bright, pure blue glow after brief light exposure. This ensures over 90% night-time readability, so you can check the time clearly even in complete darkness.
- 【Durable & Versatile Construction】The watch is protected by a domed sapphire crystal with excellent clarity and wear resistance. The bracelet is made of solid 316L stainless steel, fitted with a secure dual-push dive extension clasp for a comfortable fit over wetsuits (3-7mm thick). It also includes a quick-release premium silicone strap for easy swaps between sporty and casual looks.
- 【Complete After-Sales & Gift Package】Each watch comes in a premium TOPHILL gift box, including the dive extension clasp, spring bar tool, and a watch cloth. We stand behind our product with a 30-day no-reason return policy and a 2-year warranty, ensuring you can shop with confidence.
Movement, GMT hand and date
The ETA 2893-2 is an automatic movement with a date and an additional time-zone display. Aquadive specifies a 42-hour reserve, 4 Hz frequency and 21 jewels, and says its movement is adjusted in five positions. Its owner’s manual says the watch should have an average power reserve of 42 hours. (Aquadive owner’s manual)
The extra hand lets the wearer track a second time zone alongside local time. The manual includes instructions for setting the GMT hand and date; follow those steps for the particular crown positions rather than assuming all GMT watches set the second zone the same way.
Rank #2
- Premium Craftsmanship – This men's watch features a robust 44mm 316L stainless steel octagonal case, offering a distinctive and durable design. The sapphire lens with anti-reflective coating ensures clarity and scratch resistance, making it suitable for both adventure and daily wear.
- Precision Engineering – Equipped with the Seiko NH34 GMT automatic movement, this timepiece allows tracking of multiple time zones with accuracy. The independent GMT hand and bi-directional 24-hour bezel facilitate seamless timekeeping for the modern traveler.
- Ready for Adventure – With a water resistance of up to 300 meters (30 ATM), this watch is built to withstand deep-sea explorations and rigorous activities. The screw-down crown and exhibition case back enhance its resilience and functionality under pressure.
- Comfortable Wear – The solid stainless steel bracelet, complemented by an additional matching rubber strap, offers versatility and comfort. The fold-over buckle with safety lock and push button ensures a secure fit for any occasion.
- Inspired by the Depths – Paying homage to pioneering diver Frédéric Dumas, this timepiece combines vintage diving aesthetics with modern functionality. Spinnaker's dedication to maritime heritage is evident in the Dumas GMT, making it an ideal companion for those drawn to the sea's allure.
There is an important date-setting restriction: Aquadive warns not to manually change the date when the hour hand is between 10:00 PM and 2:00 AM. The manual says the date mechanism is engaged during that interval, and adjustment may damage the self-winding movement. Set the hands outside that window before using the date adjustment. (Aquadive owner’s manual)
Water resistance and dive-use details
Aquadive rates the watch at 100 bar, approximately 1,000 metres or 3,333 feet. That is the manufacturer’s stated pressure rating; it should not be read as advice to dive to that depth or as a guarantee of suitability at any particular depth. Water resistance depends on the watch’s condition and proper sealing.
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Rank #3
- JAPANESE AUTOMATIC MOVEMENT FOR MECHANICAL PRECISION - Self-winding technology for dependable performance.
- SAPPHIRE CRYSTAL AND STAINLESS STEEL DIVE CONSTRUCTION - Premium durability and clarity.
- ROTATING GMT BEZEL FOR TRAVEL AND EXPLORATION - Dual-time functionality with diver styling.
- PROFESSIONAL PERFORMANCE WITH EVERYDAY VERSATILITY - Ideal for travel, diving and daily wear.
The manual specifically says to screw the crown down before submersion. Ensure it is fully secured and do not operate the crown underwater. The 120-click unidirectional bezel is intended to time elapsed intervals, while the luminous material supports reading the dial in low light. The product page also specifies a helium release valve; its presence is a feature of the case, not a substitute for following the watch’s operating and servicing guidance.
Price and availability
A current price, inventory status and warranty are not established by Aquadive’s linked product page. Check the official listing or contact Aquadive for the price and availability of the color and reference you want before buying.
Rank #4
- Premium Craftsmanship – This men's watch features a robust 44mm 316L stainless steel octagonal case, offering a distinctive and durable design. The sapphire lens with anti-reflective coating ensures clarity and scratch resistance, making it suitable for both adventure and daily wear.
- Precision Engineering – Equipped with the Seiko NH34 GMT automatic movement, this timepiece allows tracking of multiple time zones with accuracy. The independent GMT hand and bi-directional 24-hour bezel facilitate seamless timekeeping for the modern traveler.
- Ready for Adventure – With a water resistance of up to 300 meters (30 ATM), this watch is built to withstand deep-sea explorations and rigorous activities. The screw-down crown and exhibition case back enhance its resilience and functionality under pressure.
- Comfortable Wear – The solid stainless steel bracelet, complemented by an additional matching rubber strap, offers versatility and comfort. The fold-over buckle with safety lock and push button ensures a secure fit for any occasion.
- Inspired by the Depths – Paying homage to pioneering diver Frédéric Dumas, this timepiece combines vintage diving aesthetics with modern functionality. Spinnaker's dedication to maritime heritage is evident in the Dumas GMT, making it an ideal companion for those drawn to the sea's allure.
For context only, Monochrome’s 2019 review reported prices of USD 1,890 for yellow and turquoise versions and USD 1,990 for orange and white versions. Those are historical prices from 2019, not current offers. (Monochrome review, 2019)
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Who should consider the Bathyscaphe/Bathysphere GMT?
This model is worth considering if you want an automatic GMT diver with a high stated water-resistance rating, a ceramic-ring timing bezel and a rubber strap included. The additional time-zone hand and date add practical everyday functions beyond elapsed-time dive timing.
Best Value
- JAPANESE AUTOMATIC MOVEMENT FOR MECHANICAL PRECISION - Self-winding technology for dependable performance.
- SAPPHIRE CRYSTAL AND STAINLESS STEEL DIVE CONSTRUCTION - Premium durability and clarity.
- ROTATING GMT BEZEL FOR TRAVEL AND EXPLORATION - Dual-time functionality with diver styling.
- PROFESSIONAL PERFORMANCE WITH EVERYDAY VERSATILITY - Ideal for travel, diving and daily wear.
The main buying caveat is not the movement specification but confirming the exact case measurements and the commercial terms for the specific variant. The discrepancy between the two published dimensions could affect fit, and the available official page does not settle current price, stock or warranty. Its stated limit of 500 pieces per color indicates limited production, but does not establish present availability.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
