Joe, that Coppertone Chambers...
is commonly known as Model "D", more correctly Model MR-9-H. It was a Model "C" dressed up in more contemporary drag, as under the trim and revised backsplash it had the same griddle/broiler, deep well, super-insulation, cast iron door seal and iron oven bottom plate construction, features, and quality as the older models that established the Chambers reputation, plus the improved "Plane-of-Flame" dual orifice row burners and electric clock/timer. IMO their range best model - we had a white one. The "D" was introduced under new management, Rangeaire Corp., after Chambers was sold, in order to better compete with more modern looking mass-market appliances from GE, Frigidaire etc. This Coppertone unit was probably circa early '60s.