Free tools Windows power users keep installed
One-click scans. No signup required.
The Bremont Supermarine S302 Jet is a 40 mm, blacked-out GMT dive watch with a date, a unidirectional 24-hour bezel and manufacturer-stated water resistance of 300 m. Bremont has officially retired the Jet from its catalogue, however, so its old displayed price is not evidence of current stock or a live offer. The specifications below are manufacturer-listed; no hands-on or independent performance testing is established here.
What is the Bremont Supermarine S302 Jet?
The S302 belongs to Bremont’s Supermarine Type 300 range. The Jet edition gives the GMT diver an all-black appearance: a stainless steel case with black DLC treatment, a black ceramic bezel and a sandblasted black dial. Its orange-tipped GMT hand adds a contrasting accent. Bremont describes the S302 as a 40 mm GMT model with a date, a 24-hour bezel and 300 m water resistance. Bremont’s US S302 page covers the broader model, while the Australian S302 Jet page gives Jet-specific details.
Manufacturer-listed S302 Jet specifications
The figures in this table are from Bremont’s Australian S302 Jet listing and should not be read as independent test results.
| Specification | Bremont-listed detail |
|---|---|
| Case | Stainless steel Trip-Tick construction with black DLC treatment; 40 mm diameter, 49 mm case length, 13 mm depth and 20 mm lug width |
| Bezel | Black ceramic, unidirectional, 24-hour |
| Dial and hands | Black metal dial; vintage Super-LumiNova indexes and hands; orange-tipped central GMT hand |
| Crystal | Domed, anti-reflective, scratch-resistant sapphire |
| Movement | Modified calibre BE-932AV; 25 jewels; Glucydur balance wheel, Anachron balance spring and Nivaflex mainspring |
| Frequency and reserve | 28,800 beats per hour (4 Hz); 50-hour power reserve |
| Functions | Central GMT, hour, minute and seconds hands; date at 3 o’clock |
| Water resistance | 30 ATM / 300 m; Bremont says the watch is chronometer rated to ISO 3159 |
| Strap | Black vintage leather strap with pin buckle |
Check the exact S302 reference before relying on specifications
Bremont’s regional and model pages do not give identical movement details. The Australian Jet listing specifies a BE-932AV, 25 jewels and a 50-hour reserve. The US page for the general S302 instead lists a BE-93-2AV variant, 21 jewels and a 38-hour minimum reserve. Those figures should not be merged into one universal S302 specification. If you are assessing a particular watch, match its reference and region-specific documentation to the listing.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →#1 Best Overall
- 【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.
Availability and historical listed prices
Bremont marks the S302 as officially retired on its US product page and the S302 Jet as officially retired on its Australian listing. Those pages display USD $3,900 and AUD $6,800, respectively; these are historical page values, not confirmed current prices, offers or proof of remaining stock. They also do not establish resale value.
For a current listing, verify the exact reference, country, condition, warranty and whether the seller is authorized. A retired catalogue model may appear through a retailer or on the secondary market, but the cited Bremont pages do not establish that any particular seller has one available.
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.
How the S302 Jet differs from Bremont’s newer Supermarine GMT
Bremont’s Supermarine 300M GMT Tundra Green is a useful family comparison, not a substitute specification for the retired Jet. Bremont lists the Tundra Green at 40 mm in diameter, 48 mm in case length, 13 mm deep and with a 20 mm lug width. Its listed movement reserve is 50 hours and water resistance is 300 m; it uses a bi-directional bi-colour 24-hour bezel.
| Feature | S302 Jet | Supermarine 300M GMT Tundra Green |
|---|---|---|
| Case appearance | Stainless steel with black DLC treatment | Not stated in the cited comparison details |
| Case dimensions | 40 × 49 × 13 mm; 20 mm lug width | 40 × 48 × 13 mm; 20 mm lug width |
| Bezel | Black ceramic, unidirectional 24-hour | Bi-directional, bi-colour 24-hour |
| Power reserve | 50 hours on the Jet-specific Australian listing | 50 hours on Bremont’s Tundra Green listing |
| Water resistance | 300 m on the Jet-specific Australian listing | 300 m on Bremont’s Tundra Green listing |
| Current price and availability | Not established; Jet officially retired | Check Bremont’s current product page for current configuration, price and availability |
The clearest functional distinction in the available specifications is bezel direction: the Jet’s bezel turns one way, while the Tundra Green listing specifies a bi-directional bezel. Their finishes also serve different tastes, with the Jet’s blacked-out treatment versus the Tundra Green model’s two-colour bezel. Bremont’s pages do not establish comparative legibility, comfort or timekeeping performance.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →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.
What the specifications do—and do not—tell you
The published dimensions, materials, movement details and water-resistance rating help identify the watch and compare it on paper. They do not amount to independent timing results, a real-world legibility assessment, a comfort evaluation, or a service-history report. The 300 m rating is Bremont’s stated specification; it is not a claim about the condition or water resistance of an individual pre-owned example.
Quick Recap
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.
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.
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.
