AI Appraisal Estimate

This is a classic cylindrical coffee mug crafted from opaque white milk glass, likely produced mid-to-late 20th century. The mug features a uniform, bright white hue with a smooth, semi-glossy finish characteristic of Vitrock or Pyrex-style tempered glass. It possesses a standard 'C' shaped handle attached to the upper side of the body, designed for a single-finger or two-finger grip. The rim appears rounded and thickened for comfort while drinking. In terms of condition, the piece shows minor surface staining or residue near the base of the exterior, which may be removable with cleaning. There are no visible chips, cracks, or significant 'flea bites' along the rim or handle joints, suggesting fair to good structural integrity. The design is utilitarian and lacks decorative patterns or logos, making it a staple of mid-century mass-produced kitchenware. While no maker's mark is visible from this angle, the translucency and weight suggest it is a durable, heat-resistant borosilicate or soda-lime glass common in American diner-style service pieces.

Based on my visual examination of this white milk glass coffee mug, I have determined it to be a mass-produced utilitarian piece typical of mid-20th-century American kitchenware. The item exhibits the characteristic opacity and semi-gloss finish of tempered soda-lime glass, commonly manufactured by companies such as Federal, Hazel-Atlas, or Anchor Hocking. The condition is rated as 'Good'; while the structural integrity appears sound with no visible chips or cracks, there is noticeable surface staining at the base that requires professional cleaning to ensure it is not permanent 'calcification' or etched wear. This specific model lacks a 'D-handle' or specific branding (like Fire-King's Jadeite or promotional decals), which limits its appeal to general utility rather than high-end collecting. The market for plain milk glass is currently oversaturated, as these items were produced in the millions. Comparable sales on secondary markets frequently show individual plain mugs selling for under twenty dollars. My valuation reflects its status as a functional vintage item rather than a rare specimen. Please note that this appraisal is based solely on digital images. Without a physical inspection, I cannot verify the presence of a maker's mark on the underside, which could marginally influence the value. A hands-on examination would be required to confirm the glass density and check for internal stress fractures or 'flea bites' that are not visible in photography. No scientific testing or formal provenance is required given the item's low market value and commonality.