1 glass - choose sapphire crystal glass (Sapphire Crystal) Sapphire crystal is a very high hardness of the material, its hardness reaches 7 times the steel. Strictly speaking, only diamonds can scratch the glass. Therefore, most Swiss high-level brands have chosen this material. Because the watch glass is very important, can be said that the watch glasses, is the most eye-catching position, and it is a very smooth mirror, even a very slight scratches will be very clear, affecting the appearance of the watch. In addition, the watch in the most outer watch, easy to collide with foreign objects and friction. Therefore, the choice of sapphire crystal glass is very important. How to determine the material of watch glass: You can watch the back cover of the material description, such as marked with English: Sapphire Crystal, which means that the watch is made of sapphire crystal glass. 2 steel - choose high quality stainless steel High-quality stainless steel with low nickel content, to ensure rust-proof, but not easy to cause allergies. There are many kinds of high-quality stainless steel, the most commonly used is 316L quality stainless steel. There are many watches on the market, the appearance of stainless steel, but the actual copper material, but coated with a layer of nickel on the surface. After use for a period of time, the coating off, revealing the inside of the copper color, will be very unsightly. Therefore, to confirm the watch with real stainless steel, is an important factor to ensure the appearance of the watch. How to determine whether to use stainless steel: Watch the back cover material description, if the watch is steel strap, the back cover marked with English: Stainless Steel, that indicates the stainless steel used in the watch; If the logo is: Stainless Steel Case, then Indicates that the watch case is stainless steel, the strap is not. 3 Waterproof - choose at least 30 meters waterproof watch Water resistant to 30 meters means that the watch can withstand 3 atmospheres of water pressure in a laboratory environment. In real life, waterproof watch 30 meters is not guaranteed to 30 meters in the water without water. Because people in the water activities, in addition to the pressure of water, but also subjected to other pressures. For example, the power generated by the arm swing, the momentum of the spray and so on. Therefore, waterproof watch 30 meters is generally not recommended when swimming or bathing wear. But waterproof 30 meters of the watch is able to ensure the daily waterproof watch, such as: rain umbrella, the drifting water droplets; wash hands splashed water drops on the wrist; summer sweat, sweating from the skin surface oozing Wait. This is very important for the long-term use of the watch, because most of the high-level watches, water vapor into the watch body will be solidified, will no longer set aside their own, need to open the lid in time for maintenance. Once the time is long and water corrodes the movement components, the problem is complicated. How to determine whether the 30 meters waterproof: Watch the back cover instructions, if the watch back cover marked with English: water resistance 30 m (or 3 atm), which means that the watch waterproof up to 30 meters or 3 atm. 4 movement - high-quality movement to ensure that the watch for a long time normal operation The movement is like the heart of a human body, or like the car's engine, the heart of a luxury watch. Once the watch is running, it will not stop until the battery or winding energy is completely depleted. Running, the movement of numerous parts complement each other, friction. Therefore, the quality of the parts, the fit between the parts, the structure and the lubrication all require skill. Therefore, the quality of the movement to ensure the long hours of work watches is essential. As the movement in the watch inside, can not see the time of purchase, even if the transparent bottom cover, it is not easy to see clearly. Therefore, generally by origin or brand to determine the reliability of the movement. Switzerland is the world recognized watch kingdom, has a wealth of experience and technology, the Swiss movement produced in the world has the highest reputation. How to determine the origin of the movement: In general, at the dial 6 o'clock position, there is a "Swiss Made" logo for the watch made in Switzerland, including the movement. But does not rule out theft of the "Swiss Made" logo, it is recommended before buying, you plan to buy the brand online to check whether it is truly Swiss made. 5 Price - The retail price of Swiss luxury watches is generally not less than 2,000 yuan Due to the cost of carefully selected materials and the high production costs of Swiss technicians, a Swiss-made luxury watch with the above four conditions generally retails at a retail price of less than 2,000 RMB. For example: Tissot, a favorite of most Swiss nationals and "National Watch" in Switzerland, is a world-renowned luxury watch brand and the most expensive Swiss watch with a retail price of between 2,000 and 10,000 yuan. So, knowledgeable Swiss people know how to spend the least money to buy high-quality watches.