Danman -
Maybe something happened to it like happened on our street in Denver. The street had 11 houses on it, all were built nearly simultaneously by one builder. They were all finished within about 4 to 6 weeks of each other. Our builder used GE kitched appliances, and not true BOL builder's grade stuff either, but not TOL.
Most of the floorplans he had called for one version or another of GE double-ovens. Ours had the two in wall ovens and a 36" cooktop. Most plans had that configuration OR GEs 30" range with the second oven on top.
Anyway, one of the houses across the street was orignally set-up with Avocado units (this was late summer 1977). I went into the house just before it was going to close, and noticed that the appliances were all now Harvest Gold and the Avocado stuff was outside in the garage, hastily put into the boxes from the gold units. Dishwasher, double oven, range hood, and cooktop.
The units sat in the garage for several weeks, the dealer never came to get them. Eventually the homeowner got annoyed and moved the stuff to the basement. Finally the dealer arranged to come by, but didn't give a pick-up order to the driver for the dishwasher, so there it stayed until the family moved and gave it to a neighbor for one of their daughters in the early 1980s.
It wouldn't surprise me if those green appliances didn't get used right away even after pickup. It seemed like the dealer didn't want them back. Maybe something like this happened?
I did however hear, with MUCH curiosity, that a few years ago Sears found a limited stock of really old belt-drive washers in an unused corner of a warehouse. Surely this happens at other places too, so this oven set may have just been forgotten about!
Gordon