It is either a Kluson BS-577 banjo tuner, or a Japanese knock off. Easiest way to tell the difference is if the screw that tightens the knob is metric, then it is Japanese.
These tuners are also known as Firebird tuners as Gibson used them on their Firebird model guitars.
Does it have a "B" or a "T" stamped in the underside of the housing? That stands for "bass side" or "tenor side" on the peghead. It's also very helpful if you have the two original gold plated screws and the "ferrule" that slides over the shaft from the face of the peghead, like a washer to the tuner shaft in place so it won't wobble.
Here's an eBay ad for a set of 6 for a Gibson Firebird guitar, undoubtedly the Japanese repros. Good photo of the ferrules.
Edited by - The Old Timer on 01/28/2021 11:02:40
Originally posted by The Old Timer
Does it have a "B" or a "T" stamped in the underside of the housing? That stands for "bass side" or "tenor side" on the peghead.
I had forgotten about the B and T stamps on the original American made Kluson tuners. That will help Joe figure out if he has a Kluson, or a vintage Japanese knockoff.
It does have a "T" stamped on the underside of the tuner. I don't think I have a ferrule or the screws, I'll need to look.
T means it would be for the 1st or 2nd string of a banjo, the "treble/tenor" strings.
'Trust' 2 hrs
'Primative banjo' 3 hrs