Electronic Express eBay Listing Description Seiko Prospex SRPG57 Save The Ocean Special Edition 42mm Automatic Men's Watch The Seiko Prospex SRPG57 is a Save the Ocean model. This particular watch has a crisp textured blue and white (ice-tone) dial with a few winsome penguin feet. The movement is a reliable 24-jewel Seiko caliber 4R36 automatic that can be hand wound and hacked. The powerful Seiko LumiBrite luminescent material is still used and it retains the same brilliant glowing properties that made the Monster such a huge worldwide phenomenon. A nice touch on this new model is that the case back indicates that it is a special edition. Key Features: Prospex Save The Ocean Special Edition Unidirectional rotating bezel Automatic with manual winding capability Day/Date calendar LumiBrite on hands, indexes and bezel Screwdown crown SPECIAL EDITION on the case back Specifications: Caliber Number: 4R36 Movement Type: Automatic with manual winding Duration: Approx. 41 hours Case Material: Stainless steel Crystal: Hardlex with lenses LumiBrite: Lumibrite on hands, indexes and bezel Clasp: Three-fold clasp with secure lock , push button release with extender Water Resistance: 200m / 660ft diver's Case Size: Thickness: 13.4 mm Diameter: 42.4 mm Length: 49.4 mm Weight: 187.0 g Bracelet Length: 198 mm Other Specifications: Screw case back Screw-down crown SPECIAL EDITION on the case back Three-fold clasp with secure lock Unidirectional rotating bezel Other Features: 24 jewels Day/Date display Stop seconds hand function