Hey Alan,
Now that I can see your photo I can say, emphatically, that I did not see you this morning at Alemany. Maybe you got there before I did and cleaned it out?? I haven't found anything there in many tries the past year and will probably give up.
Regarding the Miami, National, Oneta (Wapak), Victor (Griswold) and other possible "cheaper" lines of skillets I can tell you what Wagner said in their catalog (1924) about their National skillets:
"Dealers often have a demand for an exceedingly low-priced skillet, or desire a utensil that can be featured in sales as a special for quantity selling.
The National Skillet has been made to meet this need. It is not the equal of our regular skillet, but it is neat and well finished, and equal to many so-called extra finished skillets which other manufacturers offer. It is the lowest priced buy in our line.
We would not advise our customers to use this skillet in place of our regular goods but they can be handled in addition to these, to meet the low price demand. They will give better satisfaction then wrought iron or steel skillets, as they will not warp. They have raised bottoms to equalize heat. Aritcles cooked in them will not adhere to the skillet or become discolored."
So, that's Wagner's propaganda to their dealers. "Won't warp, won't stick". A bit optomistic I'd say. But these pans do seem to be just the same great quality of their regular line and that is what I feel about the other makes of these No.7-9 skillets. Griswold, in the early 30's added the rare Nos. 5 and 6 Victors to their 7-9 sizes. I think most of these lower priced pans were made for many years. Victors seem to date from about 1890 or so.
I have a No.7 nickel plated Miami I am fond of plus my Victor 5 which I often use for hamburgers.
One thing that surprised me was a post the other day saying that a certain Favorite skillet cover would fit both their regular skillet and their Miami skillet which says they were both the same diameter at the top. I am not sure about that but I don't have covers to check. Generally these skillet do have a smaller top diameter I think as well as being slightly shallower.
These companies didn't want to lose business to cheaper goods so they made their own. I think they probably didn't make much on these pans since the amount of work to make them was the same as on larger pans and the iron itself was cheap. Sort of a loss-leader?
Steve