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The Swatch x Blancpain Scuba Fifty Fathoms Ocean of Storms is the black Bioceramic model SO35B400, added to the collaboration collection in January 2024. It pairs a lunar-themed display back with a SISTEM51 mechanical movement. Swatch lists water resistance at 50 fathoms (91 m / 300 ft / 9 bar); that is the manufacturer’s rating, not evidence here of independent testing or dive certification.
What the Ocean of Storms is—and is not
Ocean of Storms is a Swatch-made collaboration watch that draws on Blancpain’s Fifty Fathoms design history. It is not a traditional Blancpain-manufactured Fifty Fathoms. Blancpain’s collaboration document explicitly distinguishes the brightly colored Swatch collaboration from a traditional Blancpain watch, while describing shared design cues such as the case form and unidirectional rotating bezel. Blancpain’s collaboration document.
Swatch announced Ocean of Storms on 8 January 2024 as an addition to its five-watch Scuba Fifty Fathoms collection. The announcement says it shares the earlier models’ dimensions and features. Swatch’s announcement.
Specifications at a glance
| Specification | Ocean of Storms SO35B400 |
|---|---|
| Case and crown | Black Bioceramic |
| Case diameter | 42.3 mm |
| Case thickness | 14.4 mm |
| Lug-to-lug | 48.0 mm |
| Movement | SISTEM51 mechanical |
| Water resistance | 50 fathoms (91 m / 300 ft / 9 bar), manufacturer-listed |
| Crystal | Biosourced glass |
| Bezel | One-direction rotating black Bioceramic bezel |
| Lume | Grade A Super-LumiNova on hands, hour markers and 60-minute diving scale |
| Strap | NATO strap made from recycled fishing nets; Bioceramic pin buckle and loops |
These are specifications listed by Swatch on its Irish product page; they are manufacturer-published values, not independent measurements. Swatch’s Irish product page.
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Design details and the lunar name
The name refers to Oceanus Procellarum, a lunar mare on the western edge of the Moon’s near side—not an ocean on Earth. Swatch’s 2024 announcement describes it as more than 2,500 kilometers from north to south and around 2 million square kilometers in area. Those figures are Swatch’s published description. Swatch’s announcement.
The watch has a black sunbrushed dial and a date indicator between 4 and 5 o’clock. Through the transparent sapphire display back, the movement is shown with a digital print depicting Oceanus Procellarum and the Okenia Luna nudibranch. Swatch also lists five inscriptions on the back: “PASSION FOR DIVING,” “LICENCE TO EXPLORE,” “OCEAN BREATH,” “PROTECT WHAT YOU LOVE,” and “IMMERSE YOURSELF.” Swatch’s Irish product page.
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Movement and materials
Swatch describes the SISTEM51 as Swiss-made, with 51 parts, one central screw, a Nivachron hairspring and 90-hour autonomy. The company also calls it fully anti-magnetic. These are Swatch’s movement descriptions; the available sources do not provide independent verification of those performance claims. Swatch’s Irish product page.
Swatch says Bioceramic consists of two-thirds ceramic and one-third biosourced material derived from castor oil. Durability and scratch resistance are manufacturer claims. Swatch’s Irish product page.
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Water resistance: what the rating tells you
Swatch lists this watch at 50 fathoms (91 m / 300 ft / 9 bar). Treat that as the manufacturer’s stated water-resistance rating: the sources cited here do not establish independent testing or a professional-diving certification. A depth figure in a product specification alone should not be read as proof of suitability for every dive or water activity. Swatch’s Irish product page.
Price and availability vary by market
Swatch’s product pages represented here list different regional prices: €430 on the Irish page and $445 on the U.S. page. These are market-specific listings, not a single global price, and can change. The U.S. page directs shoppers to check store availability. Irish product page · U.S. product page.
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- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
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Swatch describes the collection as non-limited and says its watches are sold through selected Swatch stores, with a limit of one watch per person per store per day. That policy does not confirm stock at any particular location; use Swatch’s store finder or the product page’s availability option for current local information. Swatch’s U.S. collection page.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How it fits the collection
Ocean of Storms joined Arctic Ocean, Pacific Ocean, Atlantic Ocean, Indian Ocean and Antarctic Ocean. Swatch says the six share dimensions and features, with each model distinguished through color and design, its named ocean or lunar theme, and the illustration on the movement back. The available specifications do not establish that Ocean of Storms is technically superior to the other models. Swatch’s announcement.
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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.
