The remarkable 500-metre water resistance of this watch means you can swim with the manta rays that inspired it. And in order to ensure there will be plenty of the gentle sea creatures to swim with, part of the proceeds from its sale will be donated to the Manta Trust charity. The trust leads global research projects and awareness campaigns to help preserve this endangered species. Carl F. Bucherer’s contribution is specifically earmarked for research on the manta ray’s movement patterns. The ultra-light titanium case is coated with black DLC, and includes a helium release valve. Two silhouettes of manta rays adorn the centre of the black dial, framed by indexes covered in Super-LumiNova, framed by a unidirectional bezel made of tough titanium and ceramic. The automatic movement, calibre 1950.1 is COSC certified.