Tritium is a natural hydrogen atom. This is called the H3. Tritium gas is sealed in a glass tube that is coated with phosphorescent paint that creates reaction and produce glowing light continuously at night. It is ideal for a night watch.
Dial Diameter: 39mm Band Width: 20mm Feature: Auto Date,Complete Calendar,Water Resistant,Swim Movement: Quartz Case Thickness: 11mm Band Length: 22cm Case Shape: Round Boxes & Cases Material: Leatherette Water Resistance Depth: 3Bar Dial Window Material Type: Hardlex Clasp Type: Buckle Band Material Type: Stainless Steel Case Material: Stainless Steel Item Type: Quartz Watch