My sister had a duplex, that had one of these. When loading large items, [turkey, roasts] it was very handy, as it was easier to heft the roasting pan in and out of it.
David
I've used drop-door and side-swing ovens, both in ranges and on built-in oven units but my absolute fave is the Frigidaire Flair "swing up" oven door! It works best for me (I'm not tall) and I find with increasing joint issues that getting a pan or dish out of the oven is so much easier when I don't have to reach over an oven door...
(Now, what shall I do when I get that 66 Frigidaire Electri-Clean range baking again... LOL)
These were good baking ovens, relatively simple in design and construction but had lots of wiring problems like other Westinghouse cooking products of this time.
Most frequent problems were burned up wires and contacts on the thermostats and burned wires on the bake and broil elements which were very difficult to fix you had to take the whole oven out of the wall and take it completely apart As well as burn wiring and cheap clocks which would keep the ovens from working at all.
The side swing doors were cheaper build and handy in some locations but more dangerous to use as others mention you can bump your elbow on the hot door and might cause you to drop some thing you might also pull a pan or something out of it and tip it back on to yourself and scald yourself with hot liquid where the door would normally protect you if it was below what you doing.
This design of an also did not feature a self cleaning oven or even a variable broil control so they were pretty simple and not very versatile.