The Seiko Sumo Black Series Limited Edition Watch is a perfect companion for diving enthusiasts and watch collectors. Whether you're exploring the depths of the ocean or going about your daily life, this watch will serve you well. The watch has a case diameter of 44.5mm, a thickness of 13.7mm, and a length of 51.6mm. Its solar - powered movement makes it reliable, and the 200m water resistance means it can handle the toughest conditions.