Say hello to the Casio G-Shock Mudman! This black model with a clear mineral glass display was made with sport mechanics in mind. As the name suggests, mud will not get through the seal, but it's also effective at keeping out oil, sand, and pretty much any dirt that would usually impede a normal watch. A really special feature, which helps if you're a sport mechanic, is the dual 1000 hour stopwatches. With them, you're able to not only time the race, but also how much time is being taken during pit stops. The other great feature is the dual illumination. You can turn it on for a 3-5 second burst and it lights up the LCD as well as the dial itself, so you'll be able to check the time easier if the lighting is too dim.
Be sure to look at the back of the watch to see if there is an engraving of the Mudman logo. This will tell you that the watch is genuine. With 200m water resistance, as well as the above features, you can be sure that this watch will stand the test of time.