Don't know the brand, but I had one that looked like that in early 70's. Used a wormgear clamp on steering column. Someone else may be familiar with that brand.
I guess if you like it and want it ....but it's not really anything special. These were low-priced, sort of generic, universal aftermarket tachs, sold in the late-60's - mid 70's. New, you could buy them in a lot of discount department stores.,in the 'auto accessorioes section', circa early '70's for about $25.00 or so. Mart3406 ================================