Seiko Prospex SPB257 Willard Black Series Limited Edition KHAKI NAVY Dial: One piece sandwich style

Dial: One piece sandwich style dial with curved chapter section and recessed numbers and hour markers

so a screw-in crown is now used in the commemorative edition to enhance the overall security of the case

Power Reserve: 48 hours (without chronoscope function)

Top Denotation Leather

Seiko Prospex SPB257 Willard Black Series Limited Edition KHAKI NAVY Dial: One piece sandwich styleCaliber Number 6R35 Movement Type Automatic with manual winding Accuracy +25 to 15 seconds per day Duration Approx. 70 hours Exterior Case Material Stainless steel (hard coating) Crystal Curved sapphire crystal Crystal Coating Anti reflective coating on inner surface LumiBrite LumiBrite on hands, index(es) and bezel Band Material Polyester Other Details Water Resistance 200m 660ft diver's Case Size Thickness: 13. 2 Diameter: 42. 7 Length: 41. 6 Weight