The Seiko SBDC087 Alpinist Prospex watch is perfect for divers and outdoor enthusiasts. With 200m water resistance, it can handle deep - sea dives. The sapphire glass ensures it stays clear even in tough conditions. The Lumibrite hands and indexes make it easy to read in the dark. It has a case diameter of about 46.4mm and a thickness of around 13.2mm, which is a great size for most wrists. Whether you're exploring the ocean depths or going on a mountain hike, this watch is your reliable companion.