Seiko Prospex SRPE27

The Seiko Prospex SRPE27 from the Sea line is a men's automatic watch. Prospex is Seiko's collection of professional-specification sports watches for land, sea and air.

It runs on Seiko caliber 4R36, an automatic movement that can also be wound by hand. The movement has a power reserve of approx. 41 hours and 24 jewels. Functions include stop second hand and day/date display.

The stainless steel case measures 42.4 mm wide, 13.4 mm thick and 49.4 mm from lug to lug. Lug width is 20 mm. The dial is protected by Hardlex with magnified glass. Seiko's LumiBrite luminous paint is applied to the hands, indexes and bezel for legibility in the dark. It comes with a three-fold clasp with secure lock, push button release with extender. Other details include SPECIAL EDITION on the case back, unidirectional rotating bezel, screw-down crown and screw case back.

This is a diver's watch water resistant to 200 m (660 ft). It weighs 186 g.