Watches are mechanical and quartz. And they both have their advantages and disadvantages.
For example, mechanical watches need to constantly start, otherwise they will stop. This is due to the specific mechanism mounted therein. The main element is a spring, which unwinds, makes arrows to move. As soon as she untwisted to the end, it is necessary to bring to its original state. In addition, over time the spring can unwind unevenly, and the clock will run forward or, conversely, delayed slightly.
If you do not want to wind up my watch constantly, select quartz or electronic variants. They run on batteries and do not require your intervention. The role of the pendulum, which imparts motion arrow, performs a quartz crystal. The disadvantage of this type of watch is that sooner or later the crystal starts to "age", arrows will move unevenly.
Choose clock, which case is made of stainless steel or brass. They will last you much longer than their plastic or aluminum counterparts. Firstly, these materials will come considerably worn, and secondly, to protect the mechanism worse hours. It is best to give preference to those hours, the body which does not colored. After a few months or years sputtering can be erased, and even the most expensive watch will look presentable.
Pay attention to the bracelet. They are made of different materials: metal, leather, silicone and others. It is best to give preference to a metal bracelet. They are less likely to deform and have been affected the environment, etc.
By purchasing watches, carefully read all the documents in order to avoid the possibility of a fake bump.