Watchmaking’s eternal pursuit of precision has produced a wide variety of technologies. After mechanical watches and before the invention of quartz movements, we find a curiosity highly popular today among collectors: watches with a humming movement, a phenomenon that lasts from the end of the 1940s until the arrival of quartz crystals at the end of the 1960s. http://monochrome-watches.com/watchtime-wednesday-history-tuning-fork-watches/?utm_source=feedburner&utm_medium=twitter&utm_campaign=Feed%3A+monochrome%2FBwOB+%28Monochrome.nl%29

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