These were in the home of one of my classmates when I lived in Watertown, SD. This would have been 1964-67. They also had a TOL three-speed GE washer, which always impressed me.
Reflecting back on these burner units many years later, (having moved from Watertown in mid-'67 upon completion of the 2nd grade) I often wondered if I had somehow conjured them up in my mind, as I'd never seen them anywhere ever again.
And here's proof of their existence! Congratulations on your big, rare score. And they appear to be in great shape, too.