National, Victor (Griswold), Miami (Favorite), and Oneta (Wapak) were all cheaper lines of skillets and some waffle irons (Wagner and Griswold) that were made to compete with cheaper, lesser quality pans. These slightly smaller skillets were made from c.1890's into the 1930's by some of the companies. From what I can tell the quality was every bit as good as the companies major line although the waffle irons were simpler and without certain patented features. Skillets were made in only 7-9 by these companies except that Griswold added a 5 and 6 in the 30's. I saw a Victor 9 and a really nice National 8 today in shops. The National had the WW logo in the center of the pan.
Steve