Name that tach.....

I was in Oklahoma last week cleaning out some junk in my new shop. Previous owner was a car guy. He had a six pack challenger that he bought new up until about 5 years ago.
Anyhow, he left me a few crappy work benches and this tach was in one of the drawers.
Looks like it could have been a factory tach on some non-mopar car to me, but that's just a guess.
Anyone recognize this tach or is it just an old aftermarket piece?

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