Water-resistant to 300 meters and equipped with a helium valve, the timepiece is designed for deep waters.

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The Angelus dive watch features a skeletonized tourbillon movement, something you don't see very often in dive watches.

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A limited-edition, khaki-green version of the Swiss watchmaker's U53 tourbillion watch has been unveiled. It is a timepiece that can be worn underwater, despite its transparent caseback.

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You can keep track of how long you have been underwater by using the 46-mm watch's internal unidirectional flange and luminescent hands and markers. Grade 5 titanium is a lightweight metal that resists scratches and magnetic fields encountered during deep dives. It is also hygienic in high-moisture environments, so it doesn't irritate your skin. You can even wear the watch during saturation diving since it has a helium escape valve.

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A screw-down crown controls the flange at 9 o'clock, while the valve is located at 9 o'clock. You can wind the watch and set the time using a second crown at 4 o'clock. In addition to Angelus’s logo on the crystal, at 12 o'clock is the watchmaker’s monogram repeated.

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With its tourbillion at 6 and 7 o'clock and a small seconds counter at 9 and 10 o'clock, the watch's vital components are arranged in a slightly asymmetrical arrangement inside its antireflective case. This timepiece has a 60-hour power reserve thanks to its hand-wound, skeleton movement. An Angelus A-300 movement with large bridges that are arranged in an openworked arrangement at the center of the dial is dubbed the Angelus A-300.

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With the U53 tourbillion diver watch, you’ll be able to choose from a green rubber strap or a hand-stitched NATO strap. Angelus has released a limited edition diver available for $42,800 at select retailers. Among its stockists in America are Cellini Jewelers, EsperLuxe, and Swiss Fine Timing. For more information, visit Angelus' website.