Vented Flowing Heat Dryer, that is the lint filter below the door.
These were terrible dryers, never saw one that worked or was worth repairing.
This is one of many older appliances that comes to mind when people say new appliances are junk and don't last, I can say with certainty that there has not been a full sized dryer built in the US in the last 30 years that was anywhere nearly as bad as these vented late 50s FD dryers were.
John L.