Who made it
I truly don't know. I won't be home until Friday, but I will post a pic of the manufacturer's plate with model number, serial number, etc, and see if any of you can tell. I know for a fact, I have found not one bit of information on this stove online, not a pic, not an ad, nothing, so It must be fairly rare.
I do remember that the serial number ends in 69, which makes me wonder if that was the year of manufacture.
The backsplash is similar to frigidaire, both in design, and constructin, right down to the entire surface behind the knobs being under a solid pane of glass with the markings embedded into the glass.
However, instead of Frigidaire's famous pull out oven, it uses removable panels to line the oven, a total of 4 panels, (bottom, each side, and back). The only other stove I have seen with this was I beleive a Magic Chef, from the same era.
The oven door also lifts off its hinges, for easier oven cleaning, like the old Hotpoint stoves.
The oven elements appear to be the plug in type, that plug into a ceramic socket in the back of the oven, again for ease of cleaning, like in the old GE stoves.
All in all, I'm not sure if another company built the stove for Monarch, or if Monarch copied the best design features of the competing companies of the day.