This Seiko Prospex Sumo GMT watch is perfect for men who love diving or outdoor sports. It can be worn during deep - sea dives thanks to its 200m water resistance. The watch has a 45mm diameter case, 13.2mm thickness, and 51.8mm lug - to - lug length. Its solar movement makes it convenient as it gets power from light, and the sapphire crystal ensures long - lasting clarity.