AI Appraisal Estimate

This item is a clear crystal hand cooler in an egg or ovoid shape, measuring approximately 2.5 to 3 inches in height. It is crafted from high-quality, brilliant lead glass, characteristic of the Steuben Glass Works manufacturing process. The piece features a series of deep, vertical, concave wedge cuts known as 'thumbprints' or 'petal cuts' that are polished to a high luster, creating a complex internal refraction of light. These utilitarian objects were historically used by Victorian ladies to keep their palms cool and dry during social events. The construction is solid, heavy glass with no visible inclusions or air bubbles, indicating superior craftsmanship. The condition appears excellent with no visible chips, cracks, or deep scratches, though minor shelf wear on the base would be expected for an authentic vintage piece. Such items often contain a discreet 'Steuben' etched signature on the bottom perimeter. This mid-20th-century design represents the refined Minimalism and Art Deco influences of American crystal production.

Upon visual examination of this clear crystal 'egg' hand cooler, the piece exhibits the characteristic brilliance and high refractive index associated with Steuben's proprietary lead glass formula. The vertical wedge cuts are executed with precision, showing the high-luster polish typical of mid-20th-century production. Condition appears to be 'Excellent' to 'Near Mint,' with no visible flea bites or internal fractures. The clarity confirms a lack of inclusions, indicating the superior quality control of the Corning-based works. Market conditions for Steuben hand coolers remain stable, though they have softened from mid-2000s highs. This specific design is a classic production piece, making it less rare than the animal-shaped 'Hand Coolers' series but highly desirable for its Art Deco minimalist aesthetic. Comparables for signed thumbprint eggs typically realize between $150 and $250 at specialized glass auctions and quality secondary markets. A significant factor impacting value is the presence of the 'Steuben' acid-etched signature; unsigned pieces or those with significant base 'shelf-melt' see a 30-40% reduction in value. Limitation of this assessment: While the visual characteristics align with authentic Steuben, definitive authentication requires a physical inspection to verify the tactile 'heft' of the lead crystal and to confirm the presence of the etched signature under magnification. I would also seek provenance documentation or original grey flannel bags/boxes. Scientific testing for lead content could be used in extreme cases to distinguish it from high-quality European imitators (e.g., Val St. Lambert), though visual markers here are very consistent with American Steuben production.