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The H2O ORCA is a configurable watch collection built around interchangeable inner and outer cases. H2O’s configurator lists multiple case, crystal, dial and handset choices, letting buyers set up an ORCA with dive-watch or dress-watch styling. The exact combination, movement and availability depend on the selected version.
How the H2O ORCA configuration system works
The ORCA’s defining feature is its modular case system: H2O says owners can change both the inner and outer cases. Its configurator describes seven outer-case styles, four inner-case types, sapphire crystals in different profiles, nine dial choices and five handset choices. Those are the configurator’s published option counts, not a guarantee that every combination is selectable or in stock. H2O ORCA Configurator
H2O presents the range as adaptable from dive and sport styling to business or dress styling. When comparing two builds, look beyond color: case material and shape, crystal profile, resulting thickness and length, dial and hands, movement, included strap and current availability can all differ.
Standard steel ORCA specifications
H2O’s standard steel configurator specifies 316L stainless steel, a 44 mm diameter, a sapphire display back, a screw-down 8 mm crown and 24 mm lug width. Case height changes with the selected crystal, while the outer case’s length depends on its style.
#1 Best Overall
- Self-contained ever glow vial lamps; Titanium case is light, strong, and hypoallergenic; high water resistance feature set.
- Vials are not inset but 80% above the face surface; This makes them visible from the edges Not just from above.
- Large, substantial, 50 mm high-vies design; Scratch-resistant sapphire crystal glass & crystal interior is anti-reflective coated.
- The gmt models include a daylight ring Plus an additional hand for tracking a second time zone
- What's included: Comes mounted with custom T.P.R. Band, 1x military-grade Thermoformed travel case.
| Crystal option | Listed case height | H2O-published water-resistance claim |
|---|---|---|
| Flat sapphire | 13.50 mm | Certified to 2000 m, according to H2O |
| 2 mm domed sapphire | 15.50 mm | Certified to 2000 m, according to H2O |
| 6.70 mm sapphire | 16.50 mm | Certified to 4000 m / 400 bar, according to H2O |
| 4 mm super-domed sapphire | 17.50 mm | Certified to 2000 m, according to H2O |
The listed outer-case lengths run from 51 mm for the Mono 2 style to 54.10 mm for Classic. These dimensions are manufacturer specifications; check the chosen case in the live configurator if fit is a concern. H2O ORCA Configurator
Movement: confirm the exact version
The standard steel configurator lists a Swiss ETA 2824 automatic movement with a frequency of 28,800 beats per hour, a 38-hour power reserve and hacking seconds. A separate H2O listing for a Black Friday 2025 offer names either an ETA 2824 or Sellita SW200. That was a dated sale listing, not evidence that either movement is fitted to every ORCA. Verify the movement on the current page for the particular configuration you are considering. Standard configurator; Black Friday 2025 listing
Rank #2
- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
What H2O says about water resistance
H2O states that ORCA versions with flat, 2 mm domed and 4 mm super-domed sapphire crystals are officially certified in Germany to 2000 m. It states that the 6.70 mm crystal version is tested and certified in Germany to 4000 m / 400 bar. The product page does not provide a laboratory name, certificate or test protocol, so these should be understood as the manufacturer’s published claims, not independently verified ratings. A depth rating alone is not a recommendation for recreational diving; follow the watch’s instructions and have its condition and seals checked as appropriate. H2O ORCA Configurator
Steel and bronze: variant-specific details
The bronze configurator describes a copper-bronze case with a 44 mm diameter, 24 mm lug width, 4 mm super-domed crystal, 2000 m water-resistance claim and ETA 2824 movement. H2O also warns that dials and some other components may be in short supply and that it cannot guarantee every option’s availability during the sales period. Do not assume the bronze and steel configurators offer identical combinations. H2O ORCA Dive / Dress Bronze Configurator
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Rank #3
- WATCH-STYLE DIVE COMPUTER - Built for both recreational and extended range divers, the Mares Sirius wrist dive computer offers versatile features to suit all levels of scuba diving; the color-coded tank pressure system allows for quick, at-a-glance readings, ensuring divers stay informed during their dives
- ZH-L16C ALGORITHM - The Mares Sirius Dive Computer features the ZH-L16C algorithm with gradient factors and predictive multigas capabilities that supports up to five gas mixes, including nitrox and trimix; this functionality is perfect for extended range divers who require precise gas management on more complex dives
- MIP COLOR, HIGH-RESOLUTION DISPLAY - The Sirius dive computer's MIP color, high-resolution display ensures that all critical data is easy to read, even in challenging underwater conditions, offering exceptional clarity at any depth in the ocean; the Sirius watch-style dive computer features three watch faces plus color options
- FULL TILT DIGITAL COMPASS - The Mares Sirius Watch-Style Wrist Dive Computer incorporates the full tilt digital compass, which comes with bearing memory and a built-in stopwatch, making navigation during a dive straightforward and accurate; the hoseless tank data integration supports up to five transmitters, enabling divers to monitor multiple tanks with ease
- FUNCTIONAL DIVE ACCESSORY- The 100-dive logbook captures multiple graphs, including detailed tissue saturation & dive profile graphs, allowing divers to analyze their performance post-dive; smart battery management system with 30 hours dive time per full charge; bluetooth connection for direct connection to a smartphone; underwater menu allows certain settings to be changed during the dive
Straps, accessories and 24 mm fit
The steel configurator lists a black calf-leather strap, hex screwdriver, security case and warranty card as standard accessories. A steel bracelet, additional outer cases and other leather straps are listed as optional. H2O specifies a 24 mm lug width, making “24mm watch strap” a useful starting point when shopping for a replacement or extra strap. Width alone does not establish compatibility: confirm the attachment style and fit before buying a third-party strap. H2O ORCA Configurator
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price, delivery and availability
When accessed on October 7, 2026, the standard configurator displayed EUR 900 excluding tax and EUR 1,071 including tax, with an estimated delivery time of 6–8 weeks. These are listing details observed on that date, not guaranteed current prices or delivery terms; check the live product page for the selected configuration, destination taxes, stock and shipping estimate. H2O ORCA Configurator
Rank #4
- 🌊 1000M Water Resistance: Pressure-tested for depths of 1000 meters, perfect for professional divers and water enthusiasts.
- ⏱️ Japanese Caliber NH36 Automatic Movement: Known for accuracy and reliability, crafted with precision by expert watchmakers.
- 💎 Sapphire Crystal: Slightly domed for enhanced visibility and scratch resistance, magnifying the dial for clear reading
- 🌟 316L Stainless Steel: Corrosion and rust-proof, offering long-lasting durability and a polished finish.
- 🛠️ Helium-Safe Valve: Fully functional Helium-release valve, ideal for deep-sea saturation diving.
H2O’s ORCA Honeycomb Dial page was explicitly a Black Friday 2025 sale listing and should be treated as historical, not as a current promotion. It mentions a second outer case offer, but does not establish that the offer remains available. H2O Black Friday 2025 listing
Quick Recap
How to choose an ORCA build
- Choose the case material and outer-case shape. Compare the steel and bronze listings, then check the selected style’s listed length.
- Select the crystal profile. The profile changes case height and corresponds to different water-resistance claims on H2O’s configurator.
- Pick the dial and handset. The configurator publishes several choices, but not every combination is necessarily available.
- Confirm the movement on that exact listing. Do not infer the caliber from another ORCA variant or an older promotion.
- Check what is included. Distinguish the listed standard strap and accessories from optional bracelet, straps and extra cases.
- Recheck the live listing before ordering. Verify price, tax, stock and delivery estimate for your chosen configuration.
