Corning Double Wall Oven
This has NOTHING to due with Frigidaire GM appliances, this oven is entirely made by Chambers, and was a troublesome piece of junk. These were also sold under the WP and KM names and then Hobart bought Chambers and then the KA name.
Only free standing single oven ranges were made by Frigidaire for the first Corning ranges, and by 1974 when they came out with the cook-top that could use any flat cookware Corning was building the complete range and they were not all that great, they had lots of wiring problems, door hinge and latch problems as well.