I was doing a little more research on this stove...there were definitely a couple generations of the Constellation range, but I didn't think that it looked quite like the Maytag Dutch Oven units...so in doing more research, found that they may have been sourced from the Vernois stove company in Mt. Vernon, Illinois. If you do a search on "Skelgas Constellation" you see several versions from the early to the mid 50s. The above stove looks to be late 50s. But, just searching Constellation gets you images of an identical stove, but branded Vernois Constellation. I vaguely remember growing up in St. Louis (in subdivisions of the late 50s) built-in gas units branded Vernois. Also out there were Philgas-Tappan stoves (similar situation...propane from Phillips 66). Apparently to fill-out the product line there were also Skelgas Constellation freezers and refrigerators (!)