Seiko Prospex SRPE99K1 Blue Dial Stainless Steel Men's Wristwatch 45mm

This is the PADI edition, made in partnership with the dive certification organization, and it shows in the details — deep blue dial, blue-and-red bezel, and the PADI logo sitting right on the face rather than hidden somewhere. Automatic movement, 200m water resistance, day-date function, same Turtle case as the rest of the line. A watch that actually means something if you dive, and still looks sharp if you don't.