AI Appraisal Estimate

This item is identified as a plate made from bone china, distinguished by its smooth, white, and translucent appearance. The visible side is the reverse, revealing a slightly concave base and a raised foot rim, typical of dinnerware. The primary characteristic is the blue underglaze backstamp, centered on the base. The mark features a crown motif, above which the words "BONE CHINA" are prominently displayed. Below the crown, the manufacturer's name "COALPORT" is clearly printed in a stylized font, followed by "MADE IN ENGLAND" and "EST 1750," indicating its country of origin and long-standing heritage. Below this, a single capital letter "S" is present, which could denote a pattern series, size, or an internal production code. The plate exhibits a good level of craftsmanship, with a consistent glaze and smooth finish. Some minor visible condition issues include light surface scratches or scuffs, and a subtle ring of discoloration or residue along the outer edge of the foot rim, suggesting either age-related wear, contact with other surfaces, or possible food stains. The overall appearance is clean, indicating it has been well-maintained despite these minor imperfections. The style period would likely be modern classic, as Coalport has maintained consistent branding and production methods through many decades. The item's quality is indicated by its bone china composition and the reputable Coalport manufacturing mark.

Based on my visual examination of the provided image, this Coalport Bone China plate appears to be authentic, evidenced by the clear and characteristic blue underglaze backstamp featuring the crown motif, "BONE CHINA," "COALPORT," "MADE IN ENGLAND," and "EST 1750." The presence of the single capital letter "S" is likely an internal production code or pattern series indicator, common for manufacturers. The plate's condition is consistent with typical use; I observe some minor surface scratches or scuffs and a subtle ring of discoloration on the foot rim, suggesting age-related wear or contact marks rather than significant damage. The overall finish appears clean and consistent, indicative of good craftsmanship and bone china quality. From a market perspective, Coalport bone china, while reputable, is generally abundant in the secondary market. Single dinner plates often do not command high prices unless they belong to a particularly rare or highly sought-after pattern, or if they are part of a complete, pristine set. Given this is a single plate without design details visible on the front, its primary value comes from its brand recognition and material quality. Comparable single bone china dinner plates from similar reputable English manufacturers typically retail for $10-40, with Coalport falling within this range. The "modern classic" style period suggests a more contemporary production, which generally has a wider availability. Factors significantly impacting value are the completeness of a set (which this is not), the specific pattern on the front (which is unseen), and the overall pristine condition (this plate shows minor wear). Demand for single, unidentified pattern plates is moderate, and rarity is low for common examples. Without a view of the plate's decorative face, or knowledge of its specific pattern name and production year, definitive pricing beyond a base-line for a quality branded single plate is not possible. For full authentication and to ascertain a more precise value, an in-person examination would be critical to assess the front design, and determine if any chips, cracks, or significant repair are present that cannot be seen in the provided image. Provenance documentation would also add to its verifiable history, though it's less critical for common dinnerware.