There are just 1,300 of these Limited Edition pieces available worldwide. The design shape is inspired by Seiko's 1965 Diver’s watch – Japan's first ever Japanese 150m Diving watch, worn by members of the Japanese Antarctic Expedition from 1966 until 1969. This watch is powered by the in-house Automatic 8L35 calibre movement, designed specifically for diver’s watches with its accuracy and durability, manufactured and hand-finished in the Seiko Watch Corporation's Shizukuishi Watch Studio. Inspired by the ancient ‘Astrolabe’ – an instrument once used to show the positions of the sun and stars to measure latitude and time - the striking underwater blue cross-line design with lumibrite indices on the dial are complemented by the Zaratsu-polished rotating bezel, curved sapphire glass and a deep blue silicone strap. Prospex is a combination of the words ‘Professional’ and ‘Specifications’. These timepieces are designed to be practical, reliable and durable within extreme or everyday environ