This model based off the GAZ limo case has multiple functions using the Seiko-Epson YM86. This model has 15 tritium trigalight tubes for constant illumination. This watch features: 1) Perpetual calendar 2) Day of the week 3) Month 4) 1 hour chronograph 5) sound alarm 6) 15 tritium tubes 7) integrated leather strap - Movement: Quartz - Case Diameter: 45mm - Case Material: Stainless Steel - Crystal Material: K1 Mineral - Bezel Material: Stainless Steel - Dial Color: Blue - Crown Type: Push/Pull - Water Resistant: 50MVostok Europe