I got one in 1980. Expensive, heavy and no turntable on the first ones. But it was great for warming up our newborn daughter’s bottle.
The family went together to get one for our mother/stepmother. It had to be Christmas 1975 or before. This was about the time they were becoming something a middle class family might obtain.
I think it was a Wards Model. It had the extra browning element.
If I remember correctly it cost about $400. That would be $2,200 today.