... but I am happy enough with my SEIKO Quartgz Astron, which is rated 10 sec per year. Since my purchase several maonths ago, I check often with the internet time.gov , it hasn't divereted even a half second. And that is my reference "clock" for my watches. To me, it is enough.....
Mster Clock - I have owned a few of them to sync all the digital equipment of my audio system. That works VERY well and it is EXTREMELY important when you own multiple digital products - transport, DAC, digital equalizer (or room frequency characteristics correction system), etc. That is what I know to be a master clock, lika a conductor of an orchestra, not necessarily the MASTER of the universal TIME
But your effort is really applaudable and commendable. I hope to see your "system" one day!
Ken