The top units
Are plain old plug in Chromalox, but much heavier braced than what is sold today,All I had to do is replace 1 switch and everything else worked fine, even the clock works, and its the only old stove I ever owned that I did not have to calibrate the ovens, both were dead on!..The thermostats are Hart brand.,the large oven has a odd feature, it has automatic preheating, when you turn it on, both the broil and bake units come on , then the broil unit cuts out when the temperature is reached...kind of like turning the old Frigidaire ovens to broil and then back to the set temp, except this does it automatically.