In 1978, Tissot created a quartz model that featured a slim case, narrow hour markers and a steel bracelet. Its wide horizontal lugs, typical of the time, were perfectly integrated into the flat tonneau-shaped case. A few years later, Tissot registered the name PRX. "PR" stands for "precise" and "robust". The "X" stands for the Roman numeral ten and the pressure of 10 bar, which corresponds to a depth of 100 meters at which the watch remains water-resistant. In 2021, Tissot presented the new PRX, a modern interpretation of the previous model. This new PRX has a 35 mm 316L stainless steel case. The Tissot PRX Powermatic 80 steel & 18-carat gold is equipped with a fluted bezel in genuine 18-carat pink gold which - together with the indexes and hands in the same color - forms a beautiful contrast with the glacier-blue dial. This PRX features a scratch-resistant sapphire crystal with anti-reflective treatment on both sides, as well as a transparent mineral glass caseback. The watch is fitted with a 316L stainless steel bracelet with quick-change system and butterfly folding clasp with pushers.