Shifter... What did I buy?!

I am currently running a Mr.Gasket Bang shifter. It's a little different than yours but the mainbody looks a lot like yours. Yours looks to be offset for a console.
If you take it apart, take pictures as you go.
I bought mine brand spanking new in about 1971 or 72. She's got over 200,000 miles on 'er. Best shifter I ever bought,minus the spaghetti rods.I built my own rods about 80,000/90,000 miles ago.