this is a original vintage Sun 5000 RPM Tach, It was in a 70 Chevy Blazer a Friend bought a few years back, the cup has pitting and the black paint dot on the inside of the glass has peeled off, but it did work fine when it was removed, one rare feature in a tach this old is that it can be set for 4-6- & 8 cylinder engines, I have seen these Factory set for 6 or 8 but never selectable for all three
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