Two Tone Stainless Steel Montblanc Automatic Watch With Date 。316L Surgical-Quality Stainless Steel Case Jeweled Automatic Movement Jewel Bearings: 22 Jewels 36-Hour Power Reserve Beats per Hour (BPH): 21600/Hour Average gain/loss Rate: +/- 45 Seconds per Day Sapphire-Coated Mineral Crystal Skeleton Dial Observation Caseback to view Movement Crystal Surround Bezel Genuine Leather Crocodile-Embossed Strap Logo-Engraved Stainless Steel Clasp Luminous Hands Luminous Markers Day Sub-Dial Date Sub-Dial 24-Hour Sub-Dial 38mm Diameter 3 ATM Water Resistance