The Seiko Prospex Solar SNE585P1 is spectacular solar powered diving watch with subtle sizing.

With it's 38.5mm diameter case (excluding crown) and a thickness of 11mm the SNE585P1 is a very comfortable mid-size diving watch. Of course the watch is water resistant to 200m and the extremely legible dial is protected by a sapphire crystal. The movement powering all this is the Seiko Cal. V147 movement, which is solar powered and accurate to approximately 15 seconds per month and a battery life up to 10 months.