The Tissot Gentleman Automatic has an exhibition case back, allowing you to admire the Powermatic 80 movement using a silicon balance spring for greater longevity, heightened precision and resistance to magnetic fields. An automatic watch is powered by the energy of the person who wears it. Wrist movement enables the mechanism to run. The Powermatic 80 movement boasts 80 hours of power reserve, which is enough to continue telling time accurately even if the watch is not worn for three days. It is an innovative movement that outperforms the competition, whose movements general provide 1.5 days of power reserve.