Seiko Astron GPS Solar SAST023 Citizen Eco-Drive Proximity BZ1028-04E known to enthusiasts as the

known to enthusiasts as the Seiko SKX series

Calibre: 3903A

so you'll never need to open your caseback making sure your watch maintains it factory sealed and water resistant

24 hour indicator

Seiko Astron GPS Solar SAST023 Citizen Eco-Drive Proximity BZ1028-04E known to enthusiasts as theCaliber: 7X52 Radio: GPS controlled time and time zone adjustment Accuracy: + 15 seconds per month Case Material: Stainless Steel with ceramic bezel Case Diameter: 47. 0 mm Case Thickness: 16. 5 mm Band: Stainless Steel with three fold clasp with push button release Glass: Sapphire crystal with Super Clear Coating Water Resistance: 10 bar Magnetic Resistance: 4,800 A m Functions Hour, minute and second hands Date calendar Perpetual calendar correct to