Whirlpool oven model RRG255A ("A" stands for Avacado)
This is a wall mounted oven door built in 60s. To remove door you need to lift up, open and pull. To put it back, you need to push in straight thru the first slot and rotate up slightly to open the hinge and then keep pushing. The trick is to clear the second fulcrum. The door gasket part number is 261680. If you know this number, you can find this part cheap.