Luminox Navy SEAL 20th Anniversary - - Case Material-carbon reinforced case with black resin band. Case Diamter-45 mm. Bezel-Unidirectional polymer ratcheting bezel. Caseback-Black carbon reinforced case back secured with stainless steel screws. Crystal-tempered scratch resistant mineral crystal. Crown-double gasket push in crown. Water Resistance-200M. Movement-jeweled Swiss quartz movement. Battery Life (months)-45. End of Life (EOL)-N.