No batteries, no problems – the Mechanical Revolution continues with Sistem Sea Flex. A sun-brushed dark blue dial with a multi-coloured print index features a date window at 3 o'clock. Flip the extraordinary timepiece over to witness the automatic movement at work through the open caseback. The watch's groundbreaking technology is housed in a matte dark blue plastic case with matching bezel. A dark blue-coloured PVD stainless steel flex bracelet adds some style to the stormy seas.