From the PRXCollection. If you’re looking for a slim, smooth watch with an authentic `70s feel, look no further than the PRX Powermatic 80. Created for those with an eye for design and packed with twenty-first century features in a Tissot case shape from 1978, the PRX is a must-have on every watch fan’s wish list. The self-winding Powermatic 80 movement delivers reliability and precision thanks to the innovative Nivachron hairspring. With 80 hours of power reserve, it’s a modern movement designed to keep pace with busy lifestyles.