Carlsbro was making top-shelf stuff at a quality level comparable to Marshall, Laney, Simms-Watts, WEM, Sound City etc in the late 60s and early 70s. I have one from '69 that sounds lovely, although it's now sitting in storage while I try and find a place where I can store it AND play it at realistic volumes. It'll dirty up a bit but not perhaps as much as some Marshalls from the same era, although I'm not as familiar with the 50s. It's definitely worth considering though if the price is right!

"You eventually learn that true priorities are like arms; if you think you have more than a couple, you're either lying or crazy."