Gentleman Powermatic 80 Silicium | 40 mm | AutomaticThe Tissot Gentleman Powermatic 80 Silicium 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. The movement boasts an impressive 80 hours power reserve when most automatic movements have a power reserve of around 40 hours. Lastly, the rotor is finely engraved with the "Waves of Time" decoration.