This is an item I picked up out of the junk box at an electronics surplus store. I believe I paid $1 for it. It has 5 tubes but doesn’t appear to be an All American 5. It used type 30 and 33 tubes so we know it’s really early. I believe it was hand built in a re-purposed case. Looking at the coils it might be a low power transmitter though your guess is probably better then mine.