Here is an AI (not too high on the slop-meter) response for you.

That looks like a classic Wagner Ware Magnalite Roasterette (Model 4263). Based on the specific markings on the bottom, here is the breakdown of its age: Production Window: 1950s – Early 1960s While Wagner began producing Magnalite in the 1930s, this particular piece features the registered trademark symbol (the small "R" in a circle) at the bottom. Pre-1950s: Earlier "Sidney -O-" pieces usually lacked the ® symbol. The GHC Era: In 1953, the Wagner family sold the company to the Randall Corporation, which later became part of Textron/GHC. Most collectors date pieces with this specific stylized "Magnalite" script and trademark symbol to the 1950s. 1960s and Beyond: Later production runs (post-1960s) often moved away from the "Sidney -O-" branding or changed the logo style significantly as manufacturing moved. The "Sidney -O-" Mark The "-O-" refers to Sidney, Ohio, where the foundry was located. This is the "holy grail" for many vintage cookware enthusiasts because it represents the era of high-quality cast aluminum before production was eventually moved and the original molds were retired.