Thomas Mercer, Marmor Hotavlje and Winch Design are pleased to announce the release of their latest collaboration – Chelys, an horological sculpture fusing the respective arts of marine chronometry, stone carving and yacht design.

“Yet again, it is a pleasure to be able to work closely with Thomas Mercer to bring to life another unique timepiece which sings with the spirit of the sea. The craftmanship of both Thomas Mercer and Marmor Hotavlje has rendered this outstanding and unique horological sculpture a triumph and showcases the time honoured skillset of both these inspirational studios.“ 

- Andrew Winch - Founder, Winch Design

The sinuous and sophisticated lines of the Chelys are carved out of white onyx, a semiprecious white natural stone with immaculate crystalline background and evocative waves undulating through its structure. Measuring 44x39x22cm and weighing 25 kilos, this sculpture is crafted through a meticulous process of using traditional hand stone-masonry, impeccably executed by Marmor Hotavlje's skilled artisans.

The new caliber TM8004 sports the sine-qua-non specifications of a marine timekeeper including the special spring detent escapement. Also known as the “chronometer escapement”, the spring detent is distinguished by its rare one impulse per oscillation, resulting in its individual – and very appropriate for the occasion – sound, featuring one loud and one soft beat.

To view Nautilus, another one-of-a-kind collaboration between Winch Design and Thomas Mercer, please click here

For more information on The Chelys please contact