AI Appraisal Estimate

This item is a cobalt blue mug featuring a translucent, deep sapphire hue characteristic of mid-20th-century pressed glass. The design consists of a multifaceted or paneled body with a repeating geometric honeycomb pattern at the base, transitioning into vertical ridges. It features a distinctive angular, 'C' shaped handle with a sharp elbow, indicative of mid-century modern influence or Art Deco revival styles. The glass appears thick-walled with a slightly rounded rim. Visible condition issues include significant limescale or mineral deposit clouding on the interior rim and upper portion of the vessel, suggesting frequent use with hard water. The mug stands approximately 4 to 5 inches tall. While no specific maker's mark is visible from the front view, the style is reminiscent of pieces produced by the Hazel-Atlas Glass Company or Federal Glass during the 1940s-1970s. The material exhibits high clarity and light-refracting properties common in vintage soda-lime glass manufacturing. No chips or cracks are immediately apparent, though micro-scratches are likely present upon closer inspection.

I have examined the cobalt blue depression-style pressed glass mug via the provided description and visual data. This piece features a distinct honeycomb base and paneled body typical of mid-20th-century mass-production techniques. While the design evokes the aesthetic of the Hazel-Atlas Glass Company or Federal Glass, the thick-walled construction and high-clarity sapphire hue suggest it may be a later 1960s-1970s revival piece rather than early 20th-century Depression glass. The visual inspection reveals significant mineral deposits and limescale clouding near the rim; this condition issue significantly diminishes the value, as heavy clouding in vintage glass is often permanent ('glass sickness') and difficult to remediate. The market for mid-century cobalt glassware remains steady due to its decorative appeal, but pieces of this specific pattern and secondary manufacturer are highly common. Comparables for single mugs in similar condition typically fall within the ten to fifteen dollar range at regional auctions or antique malls. The lack of a visible maker's mark and the presence of surface wear further limit its investment potential. Please note that this appraisal is based solely on digital representation. A full authentication would require a tactile inspection to identify mold seam quality, the presence of 'straw marks' or bubbles consistent with age, and a UV light test to check for specific chemical compositions of the glass. Documentation of provenance or an original set box would also be necessary to confirm a specific manufacturer and elevate the piece above a 'general vintage' classification.