Tissot offers "COSC" certified watches, namely homologated as chronomer. This certificate is granted by the Swiss official control of the chronometers which proceeds for 15 days to different the most demanding evaluations on the movements in order to test in particular the accuracy, the anti-magnetism and the resistance to shocks.
With the appearance of electronic objects, Tissot, in the 1930s, put its know-how at the service of its customers so that the magnetic fields generated by them do not disturb the movements of the watches. Nevertheless, the magnetic fields continued to occupy the spirit of the watchmakers. With the arrival of the silicon as a new material for components in the organ regulating a movement, Tissot can offer a much better resistance to magnetic fields generated by objects used on a daily basis such as mobile phones, televisions, computers , hair dryer, radios or magnets that close handbags. Tissot watches then become even more accurate than before.
Sapphire ice cream
The properties that a sapphire ice brings to a watch are: extreme resistance to shocks and good readability of the dial as well as needles due to its transparency. This material being the most robust after the diamond, it is used in the high horlogery industry especially for its anti-scratch virtues. Sapphire ice can adopt several forms and thus give the watch different design: flat, curved, dug or meat.
All boxes of Tissot watches undergo many controls including that of sealing. Tissot tests the capacity of the watch to withstand shocks, pressure but also to the penetration of liquids, gas, dust by reproducing the actual conditions in which the watch could be.