The watch itself is based on the second-generation Aquis, a 45.5mm stainless steel diver launched back in 2011. This edition features a grey dial with a brilliant sunburst finish that veers towards light brown and even purple depending on how the light is reflected. The watch is punctuated by blue elements, including a blue seconds hands and a blue minutes scale around the outer edge of the dial. The hours markers are applied and filled with luminescent material too, a must for any real dive watch. Delafosse seemed very pleased with the Hammerhead when I spoke with him, as well as excited at the prospect of wearing it under water.