2 ms·
also interesting: https://en.m.wikipedia.org/wiki/Shortt-Synchronome_clock https://en.m.wikipedia.org/wiki/Shortt-Synchronome_clock
by leeoniya 11y ago
also interesting: https://en.m.wikipedia.org/wiki/Shortt-Synchronome_clock https://en.m.wikipedia.org/wiki/Shortt-Synchronome_clock