There are time and frequency standards that people rely on for all sorts of things. This sort of equipment can be used to calibrate the current time and frequen

There are time and frequency standards that people rely on for all sorts of things. This sort of equipment can be used to calibrate the current time and frequency standards. Also for high precision physics measurements etc. Clocks aren’t really that important with 10ms resolution at best, although it can be fun playing with old time standard kit http://www.leapsecond.com/pages/atomic-bill/ http://www.leapsecond.com/pages/atomic-bill/