AI Appraisal Estimate

This is a vintage Pyrex Cinderella style mixing bowl, likely the #441 model (1.5 pint) based on its proportions. The bowl is constructed from durable, opaque white borosilicate glass (milky opal glass) with a fired-on exterior color in a light citrus yellow or citron shade. The Cinderella design is characterized by two distinct integrated pouring spouts/handles: one larger for pouring and one smaller for steadying during use. The interior remains bright white and highly glossy. Based on the style, this item dates to approximately the 1960s. The exterior finish appears smooth, though close inspection suggests some minor 'flea bites' or pin-sized color losses near the base, typical of dishwasher wear or age. There are no obvious cracks or large chips visible on the rim or handles. The bowl features a classic Mid-Century Modern profile. While the underside mark is not visible, these pieces typically feature the 'Pyrex' trademark with a model number and 'Oven-Ware' indicator embossed on the base, reflecting the high manufacturing standards of Corning Glass Works during the peak of American kitchenware production.

I have examined the digital representation of this vintage Pyrex Cinderella mixing bowl. Based on the 1.5-pint capacity and Gooseberry-adjacent yellow colorway, this piece appears to be a legitimate #441 model from the 1950s-1960s. The 'Cinderella' handles are physically intact, which is critical as these areas are prone to chipping. The interior gloss remains high, suggesting the opal glass has not been etched by modern dishwashers, though the 'flea bites' mentioned on the exterior citron finish do indicate moderate wear that prevents a 'mint' valuation. The market for vintage Pyrex remains robust, particularly for Mid-Century Modern palettes; however, the yellow monochrome version is more common than the sought-after pink or black accented Gooseberry patterns. Limitations: Appraisal via imagery cannot confirm the presence of high-intensity dishwasher damage (DWD) which can dull the surface under certain lighting, nor can I verify the presence of 'silvering' (metal marks) that often occur on the interior. Full authentication would require a hands-on inspection of the base embossment to confirm the 'PYREX Made in USA' trademark and a tactile check for micro-cracks along the handle stress points. The provided photographs suggest a solid collector-grade piece of utilitarian kitchenware.