cobra tachometer?

[novakx5]

Recently found what appears to be Cobra tach. Following I>D> marks shown:
1) faria patent #3005155 on bottom face of tach
2) 9000 rpm
3) backside nomenclature: 1966 stamped (top)...8 cyl (bottom)
4) chromed removal back cover
5) appears to be column mounted
6) digital photos available
7) can anyone verify authencity?

[Goober]

I rebuild old tachs and can verify if it is an original. Sounds like it might be. Shoot me a picture and I can help
Mark