That's why it's a Challenge.I find nothing about this brand name on Google.
Don't assume it has a lot of market value just because it's old. If you feel it was worth it though, then it was worth it.
Sounds like it was worth $40.
Sounds like a beast with a thick glass slide, though, and you can bash the crap outta the strings with a medium pick, and it just roars. If I were ever to have someone make me a custom acoustic, I'd want it to sound like that. I really need to immerse myself in slide techniques to do the tone justice. I also need a mic that could accurately capture the tone, because it's just orgasmic.
Of course, you may just be out $40.
Not looking for a mic that colors the tone.