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How about an early electronic?
According to the literature, the swim-o-matics were the first fully automated electronic timers for swimming contests, in use from the 1968 Olympics. This particular one I aquired recently is the model OSM4 from 1975, the curiosity is that it measures the 1/1000th of a second which was later abandoned....and btw. it's in working order but unfortunately I couldn't figure out how to simulate properly a contest
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