I have an antique Philco tombstone style farm radio from the 30’s. I won it in a bet.
I built a small circuit with a microcontroller and a 32gb SD card that plays random songs, commercials and plays from the early days of radio. I placed this inside the radio and hooked up an orange LED to illuminate the old radios tuning dial.
Old farm type radios are good for this since the speakers have a permanent magnet and not a powered magnetic coil, so you can drive them easily.
The radio’s on/off volume control switches the board from sleep mode to active mode and controls volume... there is over 50 hours of old radio files on the SD card and still room for more as I find them.
Several people have commented that they wish they had a similar old radio.... might be a good ebay sale item. There are cheap Asian import radios that look like old radios and would be a good base for constructing these. :-)