Quality is the key to a long lasting timepiece. Every Heritor watch has an automatic or hand wound mechanical movement. HERITOR watches are built for generations. A HERITOR watch can be worn by father; son; grandson and great grandson. Pass it on to the next generation. 316L Surgical-Quality Stainless Steel Case Jeweled Miyota Automatic Movement Jewel Bearings: 22 Jewels Seiko 41 Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Observation Case back to view Movement Uni-Directional Rotating Bezel Interchangeable Silicone Strap and 316L Surgical-Quality Stainless Steel Bracelet Spring Bar for Easy Interchange Bands Logo-Engraved Stainless Steel Clasp Super Luminova Hands Super Luminova Hands Markers Magnified Date Display 43mm Diameter 20 ATM Professional Diver Water Resistance