A tachymeter is on the bezel of a watch and can measure speed based on time traveled over a fixed distance. The allows the conversion of elapsed time, in seconds per unit, to speed in units per hour. The tachymeter scale and measure times from approximately 7 seconds to 60 seconds.
How do you start a tachymeter?
https://www.youtube.com/watch?v=Ftf8mafEdS8
How do you read a tachymeter bezel on a watch?
https://www.youtube.com/watch?v=u2KZV_Ar4Bo
How do you use a stopwatch on a TAG Heuer?
https://www.youtube.com/watch?v=SYelTvj9ow8
What do you use a chronograph watch for?
In a world of smartwatches, many people have forgotten just how useful and practical a chronograph watch can be. It not only functions as a timepiece, but you can also use it as a stopwatch, to measure time, speed, or distance, and more.17 Jul 2020