My Choice would be my recently purchased Isobrite Master Diver Series ISO501, Illumination: Swiss-Made T100 tritium markers, Functions / Features: Date display, Movement: Swiss-Made Ronda 715Li quartz, Battery Life: 10-years (lithium), Crystal: Scratch-resistant sapphire with anti-reflective coating, Case Diameter: 46mm, Case Thickness: 15mm, Case Material: 316L stainless steel, Caseback: Stainless steel engraved screw-in plate, Bezel: Unidirectional ratcheting diver bezel with a tritium elapsed minute marker, Crown: Double-gasket screw-in with side shields, Water Resistance:300m / 1000ft / 30atm, Band Material: Stainless steel, Band Width: 22mm, Band Clasp: Stainless steel deployment buckle with logo, Weight: 11 ounces. It is a TANK.