mens wrist watches - How to Choose It?

Talking constructional discuss about the features of a good diving watch, there are numerous choices of diving watches but not all of them meet the minimum requirements of advanced scuba divers. The question is, we should pay attention at what details while carefully choosing diving wrist-watch?
Despite the fact of none of scuba divers nowadays diving without quartz-crystal computer device. Bringing real diving wrist-watch as a secondary control system will not only instill confidence but it will become a lifesaving gear in case of the primary one is malfunctioned.
So which criteria is needed to be taken into consideration regarding to choose real, functional and reliable diving chronometer? What functions they must have to serve all the needs of diving duties?
Criteria:
The first important factor, comparing to diving computers, they must to be mechanical devices. Today most manufacturers understand clearly that hermetically and firmly sealed body is a must for diving watches. The body must be made of massive high quality steel or pure titanium or should not be multi-pieces. TAG Heuer watches are a good example because of their one body covering.
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