First introduced in the 1960s, the pr516 was inspired by the high-speed world of car racing. As tissot expands the pr516 line, it continues to fuel the spirit of those who seek a timepiece as relentless as their pursuits—driving them to face challenges head-on, just like the heroes who wear it. 41mm stainless steel case with blue tachymeter bezel white dial with blue accents, three chronograph sub-dials and super-luminova® hands and indexes scratch-resistant sapphire crystal with anti-reflective coating see-through case back swiss automatic movement interchangeable quick-release stainless steel bracelet; push-button deployment clasp 100-meter water resistance