AI identification & appraisal estimate

Vintage Cobalt Blue Stenciled Stoneware Grease Jar

Submitted photo of Vintage Cobalt Blue Stenciled Stoneware Grease Jar
Photo submitted by the user — not generated by AI

AI Estimated Value

Not an official valuation

$175 - $250

AI estimate as of January 9, 2026 · verify with a professional before acting

AI-Generated · Verify before acting

Everything on this page is generated by AI for informational purposes only. AI can make mistakes — the AI may misidentify items or misattribute them (artist, maker, brand, designer, origin, era). This is not an official valuation and should not be used for insurance, sale, tax, estate, legal, or lending purposes — or any decision requiring a certified appraisal. It is not an authoritative claim about any person, brand, or rights holder — do not share or rely on it as a factual statement about a third party. Always consult qualified professionals before making financial decisions.

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AI Item Analysis

This is a cylindrical stoneware grease jar, likely dating from the early to mid-20th century. It features a traditional salt-glazed or bristol-glazed finish in a light tan or buff color, providing a smooth but slightly textured earthy surface. The centerpiece of the jar is the word 'GREASE' applied in a bold, cobalt blue stencil. The lettering is flanked by decorative wing-like or scroll motifs on either side, typical of American utilitarian pottery. The jar is constructed with a thick, flared rim designed to accommodate a lid, though no lid is visible in this frame. Physically, the item appears to be in good vintage condition but shows signs of its utilitarian history. Notable condition issues include a significant white surface abrasion or paint chip on the right side of the stencil and scattered pitting and dark specks (iron spots) inherent to the firing process of stoneware. There is a visible patina or light staining near the base, consistent with grease or oil storage over time. The craftsmanship is robust and heavy, designed for kitchen durability. While no specific maker's mark is visible from this angle, the style is highly reminiscent of pieces produced by the Red Wing Potteries or similar Midwestern stoneware manufacturers who specialized in stenciled kitchenwares.

AI Appraisal Report

I have carefully examined the provided images of this stenciled stoneware ‘GREASE’ jar. The item is a classic piece of American utilitarian pottery, likely manufactured by Red Wing Union Stoneware or an equivalent Midwestern pottery during the early 20th century. The cobalt blue stenciling is well-defined, and the scroll motifs are characteristic of the period. The salt-glaze finish shows appropriate iron spotting and firing artifacts consistent with historic kiln environments. While the jar lacks its original lid, the body remains structurally sound. The most significant detracting factor is the prominent white surface abrasion/impact flake to the right of the stencil, which interrupts the visual appeal. There is also light staining near the base, which is expected for an authentic kitchen vessel. Market demand for stenciled stoneware remains steady among Americana collectors, particularly for labeled pieces like 'Grease' or 'Butter'. However, the lack of a lid and the surface damage limit its value compared to mint examples. This appraisal is based strictly on visual inspection of images. Full authentication would require an in-person examination to verify the 'ring' of the ceramic for hidden hairlines, a tactile check for cold-painted repairs, and a review of the base for maker’s marks. Provenance documentation regarding its origin would also enhance its marketability. Without physical inspection, I cannot definitively rule out modern reproductions or professional restorations that may not be visible in photographs.

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