Rare and vibey amp probably from the mid-late 30's. Chicago made Dobro amplifier.
Cosmetically in decent shape for an 80 year old amp although back panel missing.
The amp IS working but could use an amp tech to go through it. Speaker is working too but could use recone obviously to freshen it up.
I could only find one filter cap that looked newer and unoriginal.
This amp sounds pretty remarkably good for it's age.