Watches, or referred to watch is worn on the wrist for timing and display time of the instrument. Usually use leather, rubber, nylon, stainless steel and other materials, made strap, displays the time of "header" beams on the wrist. Originally as a table beside the instrument should take gold, but simplified Chinese characters to simplify the table table. First watch in the world in 1868 is manufactured by Patek Philippe to Hungary Koscowicz Countess. But this form of watches, is not popular at the time. The popularity of watches to be postponed until the early twentieth century. 1911 Cartier watches formally this form of commercialization, launched the famous Santos watch. Since then, the watch began to spread. Modern Watch adds more sophisticated features such as: PDA, MP3, cell phone and other forms. Production and production are based on a simple and witty invention, this is the "spring", it can tighten up and store energy, but energy is released slowly, in order to promote the operation of the device and the pointer inside the watch, to show time function, this spring means inside the watch is called the main spring (Mainspring). Watches watch constructed by the header, strap (clasp) component. Which parts of the header include: movement, case, case back, mirrors, literally (often said that the dial), a pointer to the (transfer time, also known as pressed). Major Categories Folding edit this section. Mechanical watches folding mechanical vibration system of timing devices, such as the pendulum, balance wheel bell. The working principle is the use of a constant cycle, continuous vibration of the vibration system. The vibration of the vibration period multiplied by the number of vibrations, is equivalent to the elapsed time, time = × vibration frequency vibration period. Generally it consists of several parts of energy, gear train, escapement, vibration system, the pointer mechanism and additional mechanism and other components. Power - clockwork or weights, provide energy when the mechanical clock work, so once the bar by increasing gear train can run continuously for several days, so watch escapement of the clock frequency meet the people "second" generous concept, pendulum or balance wheel controls the rudder speed of clocks, and timekeeping (newspaper engraved) agencies to tell people: I just rang a few points last. Material: high quality alloy, copper cover material: high quality alloy, copper cover, can do LOGO (laser or corrosion) Mirror material: ordinary glass, plastic mirror Dial: free design and branded logo (LOGO) Movement: Japan imported quartz Movement / domestic quartz movement battery: domestic battery, battery imports (1 Year - 3 years of life) Function: time display waterproof: life waterproof, 30 meters waterproof comprising: dial any LOGO design (according to the specific requirements) Packing: single table into a bubble bag safety packaging (wooden / plastic boxes / cartons are) Sample time: 7-10 days shipping time: 25-35 days NOTE: guests can start models or drawings given Order: 500 From Shipping: The larger the amount of the discount, support Alipay Company uphold advanced quality management, and improve after-sales service and authorized service network to ensure communication with the customer information, in order to meet all levels of customer demand; the company to continue to pursue the "honest, quality win "business purpose; adhere to the" science and technology, fashion, health, "for development-oriented, in the" integrity, innovation, and guide collaboration and speed "concept, the sincere cooperation with all sectors of friends, go hand in hand and create greater glories.