Corning Ware-style ceramic cookware base

This image displays the underside of a white, glazed ceramic or glass-ceramic vessel. The item is marked with a stamp that reads verbatim: '- CORNING WARE © - P-89-B 2 1/2 CUP RANGE - OVEN - MICROWAVE CORNING, NY, USA 111180MA'. Based on this marking, the item appears to be a 2.5-cup capacity saucepan or similar dish consistent with the Pyroceram line developed in the mid-to-late 20th century. The material is a smooth, high-gloss white. Visible condition issues include some surface scuffing at the top edge and several small protrusions or manufacturing pits in the glaze toward the bottom center of the frame. The typography and 'Corning Ware' branding are stylistically consistent with pieces produced in the late 1970s through the early 1980s, though this cannot be confirmed without further inspection. While the stamp is highly legible, physical verification would be necessary to establish the absence of modern reproductions or later applied marks. This design is highly characteristic of mid-century American kitchenware utility and durability.

Based on my examination of the provided image, this item bears marks consistent with a Corning Ware P-89-B 2.5-cup saucepan. The marking indicates a composition of Pyroceram, a glass-ceramic material popularized in the mid-to-late 20th century. Based on what I can see, the typography and branding suggest a production period likely spanning the late 1970s to early 1980s. However, I cannot verify the material integrity or the legitimacy of the backstamp from a photo alone; a physical inspection would be required to rule out later reproductions or altered markings. The value of $15-$35 is predicated on the hypothesis that the item is a genuine vintage Corning Ware piece. While these items were produced in high volume and remain common in the secondary market, they retain steady demand for their utility and retro aesthetic. The condition appears fair to good, though I observe surface scuffing and glaze irregularities that may slightly depress value compared to mint-condition examples. If this item were found to be a modern replica or a non-Pyroceram imitation, its value would likely drop to a purely functional utility range of $5-$10. To confirm the identification, an in-person examination would be necessary to verify the weight, thermal properties, and specific wear patterns characteristic of authentic period glass-ceramics. This estimate reflects general market behavior for similar mid-century style kitchenware available through online marketplaces and estate sales rather than a specific auction record.