I seem to remember seeing a copy of a catalogue from the early 20's showing the breakfast skillet for under $9.00 a dozen. I could be wrong but I also have run into things like the following.
Sears and Roebuck got caught-up with their own brand too and declared in 1908 that Imperial Stove Hollow Ware was “as easy to keep clean as china." Moreover the gray cast iron and pure white porcelain were "united at an intense heat, thereby forming a perfect union of the two."
There were some innovations.
A few years after the Sears ad, Griswold offered the public their delightful Colonial breakfast skillet. Compartments provided for bacon, hash browns, and eggs according to author Weaver. "In this unique skillet, an entire colonial meal was condense and frozen for time in iron," adds the researcher. "It was America's first TV dinner, long before TV."