New rallye dash replacement gauges/tachs (some insider news from the supplier)

340sFastback said

My car has all original gauges and original tach they all still work correctly. So looks like original design was pretty good to me.

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Exactly... And I know of plenty of other examples... It's when you bring aftermarket parts into the mix that thing don't work.... I'll agree age, possible abuse/neglect can be a factor... But the original design was sound...