TISSOT T1374071109100 PRX Automatic GR - Stylish Swiss Watch with Date Function and Stainless Steel BraceletProduct Highlights The name "Precise and Robust" signifies high precision and durability, and the PRX, which features a water resistance of 10 atmospheres represented by "X," showcases a smooth and beautiful line that seamlessly transitions from the case to the wide links of the bracelet. The "Powermatic 80" achieves reliability and precision through its innovative Nivachron R balance spring. The movement boasts an impressive 80 hour power reserve.