The mechanical watch is characterized by using a cord responsible for generating motive energy. The gears, in turn, transport this energy and is an element that serves to control the passage of time. Every mechanical wristwatch as seen on pendulum shares the same essential elements. The first of these mechanical watch elements is the winding. The second is the gear train. In technical parlance, the nomenclature given to the gear train is the gears of wheels.
The third and last element considered essential is the escapement: this organ is a regulator that effectively marks time. The escapement is the part of the mechanical watch that has greater precision, greater complexity, and yet is an extremely delicate part.
There are two models of mechanical wristwatches within the mechanical watch categories: the manually wound watch and the automatic watch, also called self-winding. The manual winding mechanical watch is very well known, as it is the model that people need to wind periodically to remain working.
The automatic mechanical watch, in turn, is wound automatically with the movement of the wrist due to a system that uses a weight called oscillating mass or rotor. Platinum is the main chassis of the mechanical watch. It is composed of a plate called platinum or bridge where several gears are included. The platinum, together with the moving elements, form the movement of the mechanical watch.
The mechanical watch winding contains a coiled spring around an axis, which, when it is wound, stores the energy that it will try to release and return to its original shape due to the elastic characteristic of the material with which it is made and yet, by a drum that causes this energy conversion to be changed to rotation. The shaft in the center of the drum is called the tree.
The barrel is one more piece of the mechanical watch, and it contains a winding spring. The spring end is attached to the inner wall of the drum, and the other end is attached to the tree. When winding the mechanical watch, the spring winds itself further, generating a tension whose release is precisely the motive energy of the mechanical watch. In a manual mechanical watch, the spring is fixed to the barrel wall and has an endpoint where the string is at its maximum tension.