Hello Guys welcome! I’ve got a few watches here laid out on the table and uh many of us have chronographs in our collection, whether it be a speed master a speed timer some sort of a stop watch and so forth. Today I’m going to explain the simplest and most effective way to use a tachymeter on any chronograph. The intro today we're going to speak about chronographs namely tachymeters whether it's a speed master or a speed timer whatever version you might have yourself but uh the word chronograph itself it means the measurement of time it was uh it's basically a Greek word it comes from the word chronographs which means Chrono means time and graphos means to write or to record so it's the measurement of time so it's basically a fancy word for a stopwatch and that's what these things are. You know a simple chronograph like this is a stopwatch you hit the start button the seconds hand starts to measure elapsed time over something. You might be uh recording your s