Re: Rare dealer tach, Can anybody give me more info?
That dash mounted design was available from Chevrolet from 1966-1971 as an accessory for ALL 8 cyl. vehicles,including trucks.
Is there a Chevrolet Bowtie outline on the top cover?
If so it's the earlier released #993716,with it's silicone transistorized circuitry protected against damage in case of battery reversed polarity, and a replaceable dial bulb.
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