The mechanical stopwatch is a precise chronmetre.it's an ideal scientic research instrument used in schools lab.It's reliable.

This mechanical stopwatch is precise chronmeter.It is an ideal scientific research instrument used in mineral,medicine,science research of universities,colleages,high schoola,vocational schools. And it is an educational instrument necessary for middle schol lab.

Finely processing and strictly examed,the stop watch measures time accurately and therfore is reliable. The minute hand and the second hand of the watch tell time separeately and its numbers are clear and visual. Its start and stop are all operated by only one control. ANd there is another control to presume its start. The inner mechanical structure makes it durable.

Its effective working time is 12 hours. Its working duration is 724 hours.

Mechanical Stop Watch