This rare and vintage Tissot PR516 Chronograph was manufactured in the 1970s. It is in excellent vintage condition and the dial is super clean. The back case was engraved, and then attempted to be removed. There are some faint marks that still remain. It features the well known Lemania 873 Movement. The watch has been tested; it is approximately 15 seconds per day fast, and 330 amplitude. It could be due for a service if you want it to keep more accurate time.