AI Appraisal Estimate

This is a vintage octagonal depression glass plate, likely produced by the Tiffin Glass Company or a similar American manufacturer during the late 1920s to 1930s. The plate is crafted from translucent 'Vaseline' or green uranium glass, characterized by its distinctive pale green hue which is known to fluoresce bright green under ultraviolet (black) light. The item features a paneled, eight-sided (octagonal) geometric design with raised ribs or spokes radiating from the center ring toward each corner, a style quintessential of the Art Deco period. The center is recessed with a defined circular foot ring on the underside for stability. Although no maker's mark is visible in the photograph (typical for this era of mass-produced pressed glass), the mold work appears crisp. Regarding condition, the glass shows light surface scratches and minor cloudiness consistent with age and domestic use. There are visible small 'straw marks' or cooling lines, which are manufacturing artifacts common in depression-era glass and not considered damage. The edges appear relatively smooth, though tactile inspection for micro-chips (flea bites) would be necessary for a full appraisal. The piece exemplifies the machine-pressed craftsmanship aimed at providing affordable elegance during the Great Depression.

I have completed a visual examination of the octagonal Tiffin-style green uranium glass plate. The specimen exhibits the characteristic saturation of 1930s-era depression glass. Authenticity is supported by the presence of 'straw marks' and the specific geometric molding indicative of the Art Deco period. While the fluorescence is not shown, the specific 'uranium green' tint is virtually unmistakable to a trained eye. My inspection notes light surface abrasions and internal bubbles (seeds), which are consistent with domestic use and the manufacturing standards of the Great Depression. The market for depression-era glass currently favors high-end patterns (like Royal Lace or Cherry Blossom) or rarer forms like butter dishes. Standard plates of this type are plentiful. Comparable sales indicate a stable but modest demand, with similar patterns primarily appealing to collectors of green glass or 'black light' displays. Factors enhancing value include the octagonal geometry and the absence of significant edge 'flea bites' or 'sickness' (permanent clouding). Limitations: This appraisal is based on photographic evidence. Precise valuation is hindered by the inability to perform a tactile edge inspection or a UV-light confirmation to calculate the exact uranium content. To achieve a certified appraisal, I would require an in-person examination to check for professional restorations (grinding) undetectable in photos. Scientific testing via Geiger counter or UV radiation would confirm the radioactive content, though visual evidence strongly suggests authenticity.