1) The watch had a tachymeter bezel that allowed the wearer to calculate speed.

2) He used the tachymeter on his watch to measure the distance he had run.

3) The tachymeter on his car's speedometer helped him keep track of his driving speed.

4) The tachymeter scale on the watch was used by the pilot to calculate the distance covered.

5) She used the tachymeter feature on her watch during her morning run to pace herself.

6) The tachymeter markings on the dial of the watch made it easy to measure speed accurately.

7) The tachymeter function on the stopwatch made it useful for tracking speed in races.

8) The tachymeter on his smartwatch helped him time his laps during his workout.

9) The tachymeter on the dashboard of the car displayed the speed traveled in kilometers per hour.

10) He used the tachymeter on his watch to determine his average speed during the bike race.