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@ryanl @thomasfuchs this is basically it - A battery-powered quartz watch is simple, accurate, and will run for years with no maintenance. It's made of inexpensive materials and you can run off a line of thousands with relatively little time and labor.

A mechanical watch is fiddly, requires regular winding, and even then will slowly either gain or lose time. It's made at least partially by hand, using lab-created precious gems for bearings, and require occasional disassembly for a clean/lube.