Sidney, Ohio · 1891–1999 (Sidney foundry)
Wagner Manufacturing was founded in Sidney, Ohio, in 1891 by Bernard and Milton Wagner and became Griswold's main rival. For roughly its first two decades it marked iron with the plain word WAGNER, later with SIDNEY O.; from about 1914 it used the name "Wagner Ware", and around 1922 it introduced the "stylized" logo — one large fancy W for both words, with SIDNEY and -O- below — which collectors date in phases: heat ring with size number (about 1922–1924), heat ring with catalog number (about 1924–1935, including the 1924–1934 "pie logo") and smooth bottom (about 1935–1959). Wagner was sold to the Randall Company in the early 1950s; Randall bought Griswold in 1957, Textron took over both in 1959 and General Housewares in 1969, and the Sidney foundry ran until 1999. Wagner also made Magnalite, a cast aluminum line that is not cast iron. Pre-1960 Wagner skillets have milled cooking surfaces comparable to Griswold.
Identification marks
Stylized Wagner Ware Sidney -O- logo on the bottom with a four-digit catalog number (1058 on the No. 8 skillet, 1059 on the No. 9) and a mold letter; earlier pans show a plain WAGNER or Wagner Ware mark with SIDNEY O. and a size number. Later pieces read Wagner Ware with MADE IN USA. Magnalite pieces are aluminum, not iron.
10 hand-curated Wagner Ware reference pages — every one with identification marks, common defects to inspect, and typical used price bands.

typical $70–$150
c. 1922–1959

typical $40–$100
c. 1922–1959

typical $80–$200
c. 1891–1922

typical $50–$120
c. 1922–1959

typical $90–$260
c. 1920s–1959

typical $20–$60
c. 1920s–1960s

typical $150–$320
c. 1920s–1940s

typical $50–$130
c. 1930s–1950s

typical $35–$90
c. 1920s–1950s

typical $100–$240
c. 1910s–1940s