The Seaturtle-Titanium features a traditionally sized 40 mm brushed TITANIUM case.Turtle-shell textured dial design with luminous.Equipped with rugged screw down crown & case back, 100 M water resistance, durable Titanium case, long lasting handmade cowhide strap, scratch-resistant sapphire crystal, precision Japanese automatic movement (Miyota 8215), Swiss Super Luminous hands and markers; WHY TITANIUM? 1.30% lighter and 40% harder than stainless steel; 2. Corrosion resistance, heat resistance, super durable, perfect for outdoor sports enthusiasts; 3.Perfect for those people with steel allergies; SPECIFICATIONS: Item Model：SEATURTLE BDA007T Gender：Mens Size：40mm Diameter/12.5mm Thickness Case Material：Titanium Glass：Sapphire Crystal Movement : Miyota 8215 Water Resistant: 10 ATM Straps: Genuine Leather Luminous:Swiss Superluminova BGW9 Crown: Screw-down