I own several mechanical watches and i was never really into their accuracy. They are all pretty good and i don't need to be hooked on seconds. That was until my Miyota powered Helberg started to run way to fast and i have to readjust minutes every other day. So now i would like to know how accurate each watch is. And i know curiosity killed the cat, but i like gadgets and i would like to know more about tools that measure watch accuracy. How do you do it?
Do you rest your watch together with a quartz or radio watch and check after 1, 2, 3, days? Or are there any specific tools for this job?