Description Case Diameter: 42mm Case Lug to Lug: 47.5mm Case Thickness: 19mm including domed glass Case Lug Width: 22mm Case Material: Stainless Steel 316L Movement: Seiko NH35 Crystal: Double Sapphire Domed, Inner AR Coating Base Dial: Adventurine Hour Hand: Transparent Disc, Superluminova C3 Luminous Markers Minute Hand: Northern Star Tip, Superluminova C3 Luminous Northern Star Second Hand: Sweeping Upright with Orb, Superluminova C3 Luminous Orb Inner Dial: 3D Effect of Astronomical Object Strap Material: Premium Horween Genuine Leather (Black or Brown) Strap Buckle: Stainless Steel Signed Crown: Push/Pull Signed Crown Water Resistance: 3ATM Serial Number: Each case will be assigned a unique running number based on inner dial Warranty: 24 months