Two years after offering the Black Bay Ceramic One as a unique piece for the charity auction Only Watch, Tudor is debuting the Black Bay Ceramic.

While the one-of-a-kind timepiece Black Bay Ceramic One from 2019 is similar to the 2021 production model being launched today in dimensions and layout, there are a few notable differences between the two models.

First, the Black Bay Ceramic dial has a more standard white lume whereas the one-off charity piece uses a tone-on-tone black lume. The matte black ceramic cases are both 41 mm in diameter (the thickness of 14.8 mm may have increased to accommodate a new sapphire caseback), so this is not the size of the popular, smaller Bay Bay Fifty-Eight that measures 39 mm. Plus, the new dial has a sunburst pattern with a glossy finish whereas the Black Bay Ceramic One dial was sandblasted to a matte finish.

Second, instead of a Tudor in-house movement with chronometer certification, the regular production model’s new caliber MT5602-1U automatic movement (an updated version of the existing movement from the Ceramic One charity timepiece with an added “1U”) has been enhanced to take advantage of  Master Chronometer certified by METAS (the same as Omega), which is a step above a typical chronometer and past Tudor movements — and it’s the first time such a caliber has been seen in any Tudor timepiece. The regular 41 mm Black Bay models currently use the caliber MT5612, which shares the 70-hour power reserve but is COSC-certified whereas the newer movement is COSC-certified with the additional METAS rating that most notably is anti-magnetic to 15,000 gauss. One of the most interesting features is that the new movement has a black treatment, visible through a clear caseback.

Third, the Black Bay Ceramic One sold for $352,756 while the new Black Bay Ceramic (Ref. 79210CNU) retails for $4,725.

Each Black Bay Ceramic is paired with both a hybrid leather and rubber strap with 316L steel folding clasp and safety catch in black PVD-treated 316L steel, and an additional black fabric strap with a cream stripe down the middle and black PVD-treated 316L steel buckle.

While the case is ceramic, the unidirectional rotatable bezel in black-PVD-treated stainless steel with 60-minute graduated insert in black ceramic with a sunray satin finish and engraved markings and numerals.

If there’s any doubt that Tudor plans to continue the full-size 41 mm diameter Black Bay collection — considering the remarkable demand for the smaller Black Bay Fifty-Eight line — this is perhaps the answer to that.

Learn more at Tudor.