zOwie Omega Discussion Forum

It might be interesting to note that portable timepieces have been manufactured with aaccuracies much better than what you are talking about without a reference standard. Just one example: in 1934 the firm of Dent in London built a chronometer with a measured rate error of under one second per year. Standards for marine chronometers are more stringent than those for "superlative chronometer" which is found emblazoned on the dials of some watches. These watches do not have a chronometer escapement which is the most accurate mechanical one. If you are using a watch as a timepiece and wish it to be accurate, why not just buy one of the watches that are radio-synchronized to a national standard and be done with it.