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.
That dryer is a Frigidaire Air-Flow dryer from 1957-1960. In 1999 I found a beautiful 1959 Imperial version of this dryer in Turquoise. It was at an estate sale still hooked up and being used in the house 40 years later. I used this dryer as my go to dryer for nearly 9 years and I loved how well it performed. It has a lower-air flow than a Whirlpool/Kenmore dryer of the time so it took slightly longer to dry clothes however because of the lower air-flow the clothes always came of it so super soft which I much prefer over higher-air flow dryers. Never once did I have any mechanical issue with this dryer.
I think this dryer went off to Greg in Omaha and now it resides with Paul in Quebec. I do remember Paul had motor issues with it but after 60 years of use that is to be expected.
Here it is hooked up in early 1999 in my old house...