Continuing the tradition of one of a kind dive watches for Only Watch that started in 2015, Tudor has just unveiled the Black Bay Ceramic One.

Entirely clad in matte black but composed of several different materials, the Black Bay Ceramic One is starkly different from any other Tudor dive watch.

The 41mm case is made of ceramic, while the bezel is black-coated titanium fitted with a ceramic bezel insert. Both the case back and crown and black-coated steel, but the back is unusual – it’s the only Tudor watch with a display back aside from the little loved North Flag. The sapphire back reveals the MT5602 movement, a “manufacture” calibre with 70-hour power reserve and silicon hairspring.

The dial is all-black to match, with the markings and text printed in glossy back to distinguish them from the matte black dial surface. The hands and hour markers are filled with black Super-Luminova, which will glow green in the dark, albeit dimly.

And the strap is rubber, but lined on the top with matte black alligator, which is the same construction as the rubber-calf strap found on the recently launched Black Bay P01.

The Black Bay Ceramic One (ref. M7921/001CN) has an estimate of 4,500-5,500 Swiss francs. If past Tudor watches made for Only Watch are anything to go by, it will blow right past the estimate straight out of the gate and probably finish just over 300,000 Swiss francs.

It’ll be sold on November 9, 2019 at Christie’s in Geneva. Visit onlywatch.com for the rest of the Only Watch 2019 line-up.