Seiko Prospex SPB323 Sumo Ceramic Bezel Grey Dial oktober With the dual-curved sapphire crystal

With the dual-curved sapphire crystal

version of Marathon's line of diver's watches

even in poor visibility and flight conditions or in stressful situations

• Crown screwable

Crystal: Sapphire Crystal with anti-reflective coating

Seiko Prospex SPB323 Sumo Ceramic Bezel Grey Dial oktober With the dual-curved sapphire crystalCaliber Number 6R35 Movement Type Automatic with manual winding Accuracy +25 to 15 seconds per day Duration Approx. 70 hours Jewels 24 Functions Stop seconds hand function Date display Case Band Case Material Stainless steel (super hard coating) Case Size Thickness: 13. 4mm Diameter: 45. 0mm Lug to lug: 52. 6mm Crystal Sapphire crystal Crystal Coating Anti reflective coating on inner surface LumiBrite LumiBrite on hands, index(es) and bezel Clasp