Old school tach question

Anybody know what all I need to make this tach work? All I have is the tach, apears to be cable operated. I was thinking it'd be cool in my duster.If I can't make it work I have a cpl spare monster tachs I could use but I'd rather use this because I think it's kind of neat. Thanks for any help or suggestions,here's a pic.

It's an SW tach
Thanks,
Jr.