30-watt late-'40s early-'50s pre-Bogen PA Challenger CH-30 tube head for sale. Mono.
I believe the tubes are original; they are untested. No power cord.
This is a great head to convert into a guitar or bass head. At least that's what the internet says. I have never owned or made a conversion myself. Speaker outs will need to be changed to 1/4", and the inputs will need to be changed to 1/4" too.
If you have any technical questions, I cannot answer them. I have not powered this up (no power cord) so it is a project.