Tissot Tradition Collection Ladies Tradition 5.5 Lady T-Classic Watch With A Grey Stainless Steel Strap & Blue Dial. The Tissot Tradition family gives ultra-modern watchmaking a justified hint of nostalgia, giving today’s technology a vintage-style design signature. High-tech operation is perfectly balanced with classical details and subtle vintage-look finishes. These are complemented by design elements such as guilloche decoration and a gently curved case. The Tissot Tradition promises wearers endless hours of precision with sustainable good looks. Water Resistance All Tissot watch cases undergo several tests, including a water resistance check. Tissot tests the watch's ability to resist impacts and pressure, as well as the penetration of liquids, gas and dust by replicating the real-life conditions in which the watch may find itself. Sapphire Crystal Glass A sapphire crystal gives a watch the following properties: extremely high resistance to impact and superior screen and hand readability thanks to its transparency. Because it is the strongest material after diamonds, it is used in fine timepieces for its anti-scratch prowess. Sapphire crystals can take many forms and give the watch a variety of looks: flat, domed, concave or ground.