Accuracy for vintage watches is a relative thing.
Fifty or more years ago, the average Joe just wanted to know when to catch the bus/train, knock off for lunch or catch a mate for a beer. So the average watch had "acceptable" accuracy.
Where more precise timekeeping was required (pilots/navigators/hookers) of course the need for greater accuracy resulted in watches that were tuned and calibrated for the required task, the result is a number of great vintage watches that can still keep time to seconds a day.
Accuracy was also enhanced by the daily ritual of watching the time ball drop from the tower and setting your watch to that signal.
We now have quartz, phones, Fitbits, GPS navigators etc, but I'd still like to do the old fashioned thing with my vintage watches if I knew where an actual time ball tower still operated.
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