Seiko Prospex SPB257 Willard Black Series Limited Edition engineer Measuring Capacity: 00'00''00~59'59''99 (for the

Measuring Capacity: 00'00''00~59'59''99 (for the first 60 minutes)

Series: Seiko 5 Sports SKX Sports Style GMT Series

Crystal: Dual-curved sapphire crystal

Caliber Number:  4R36

more compact analog-digital GMA-S2100 featuring modern green accents

Seiko Prospex SPB257 Willard Black Series Limited Edition engineer Measuring Capacity: 00'00''00~59'59''99 (for theCaliber 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