Bremont Supermarine Deep Blue: Full Ceramic Dive Watch

Limited to just 250 pieces, the Bremont Supermarine Full Ceramic Deep Blue is a dive watch built around a lightweight blue ceramic case and a serious 500-metre depth rating. It enters the market at a US retail price of $7,400. The watch combines the brand's established Supermarine architecture with a material set usually seen at a higher price point. Bremont positions the Deep Blue as its most technically advanced dive watch. It’s part of a growing trend of brands leveraging advanced materials for true tool-watch applications, moving beyond the traditional constraints of stainless steel. This model continues the narrative we saw in other tough timekeepers, where material science is as important as the mechanical movement inside.

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The Ceramic & Titanium Super-Structure

The case construction is the main story here. It's a 43mm mono-block design made from blue zirconium-dioxide ceramic. This material is formed from a powder, sintered at 1,450°C, and results in a case that is extremely scratch-resistant and lightweight. To achieve its 500-meter water resistance, the ceramic shell houses a titanium inner case. This hybrid approach gives the watch the structural integrity it needs to handle high pressure without the weight penalty of an all-steel build. The complete watch weighs a reported 74 grams, light for a 43mm diver.

Dimensions and Wearability

The numbers are 43mm in diameter, 12.98mm in thickness, and 50mm lug-to-lug. While 43mm is large, the ceramic's matte, sand-blasted finish absorbs light, reducing its visual presence. The 50mm lug-to-lug is the more critical figure for wearability on smaller wrists.

Field Tested: From Jungle to Glacial Ice

Bremont reinforces its tool-watch credentials by putting its watches through real-world tests. The Deep Blue was taken to Iceland by Bremont Ambassador and former Royal Marine Aldo Kane. This followed a previous test of the Supermarine Full Ceramic platform in harsh jungle environments. The brand provided specific coordinates for the field test: 64°57′50.2″N, 19°1′16.2″W, placing the expedition in Iceland's remote interior. This kind of documented testing directly links the watch's specs to its intended purpose. It’s a theme we’ve seen across some of the toughest timekeepers designed for extreme conditions.

The Bremont Supermarine Full Ceramic Deep Blue

The Deep Blue builds on Bremont’s Supermarine platform, a line known for its over-engineered approach to diving and aviation watches. This edition pushes the material science component further than its steel counterparts. It's a direct evolution of the brand’s focus on durability.

A Dial Built for the Depths

The dial is black with a subtle wave effect, designed for contrast and clarity. Trapezoidal indexes flow from the unidirectional titanium bezel onto the dial, forming a naval-inspired crosshair at the center. This design element provides a strong visual anchor for reading the time at a glance. The hands are black gold-plated and, along with the indexes, are filled with blue-emission Super-LumiNova. Using blue lume provides a consistent color signature in low light, fitting the watch's deep-water theme. The result is a highly legible display, critical for a dive instrument.

The Caliber BB64AH Engine

Inside the titanium container is the Bremont calibre BB64AH. This is an automatic movement based on the Sellita SW300 architecture. It operates at a standard 4 Hz (28,800 vph) and provides a 56-hour power reserve, which is a useful extension over the typical 38-42 hours.