Here's an Olympic model 447 4-transistor radio from circa '56. If you're a small company in the mid '50's and want to get on the transistor radio bandwagon, what do you do? Simple, you take your existing 4-tube portable radio, modify the circuit to use transistors, and mount the transistors in the tube sockets that were on the original tube chassis.
I have not yet tested this radio; but, I'm sure it won't take much work to get it going (assuming that the germanium transistors are good).
