AI identification & appraisal estimate

Modernist geometric work on paper signed 'Calder' (not authenticated)

Submitted photo of Modernist geometric work on paper signed 'Calder' (not authenticated)
Photo submitted by the user — not generated by AI

User's notes

Alexander Calder painting on paper, artist’s signature in pencil at lower right, and artist’s proof (AP near lower left corner of red triangle)

These notes were written by the person who submitted this item. Appraiser.AI has not verified them, and the AI's identification and estimate may rely on them.

AI Estimated Value

Not an official valuation

$10,000-$20,000

AI estimate as of August 23, 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.

This analysis also relies on unverified notes provided by the user, which may be incomplete or inaccurate and could affect the result.

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AI Item Analysis

This framed work on paper features an abstract composition consisting of various interlocking geometric shapes, predominantly triangles and pyramidal forms rendered in a bold primary color palette of yellow, red, blue, black, and white, outlined with heavy black ink lines. The paper appears off-white or cream-toned, set within a double mat board consisting of a white inner mat and a wider outer mat, housed under glass in a simple black frame. At the lower right corner, there is a visible pencil signature appearing to read 'Calder'. Near the lower left corner of the central red triangular shape, there are faint markings that could be interpreted as 'AP'. The user-supplied attribution claims this is an Alexander Calder painting on paper with an artist's proof marking, but this claim remains entirely unauthenticated and unverified from visual evidence alone, especially given the prevalence of prints, reproductions, and forgeries associated with blue-chip names. The work exhibits a clean presentation with no immediately obvious surface damage, tears, or fading visible through the glass, though detailed physical inspection of the medium, paper texture, and backing would be required to determine its exact production technique, whether original gouache, lithograph, or print.

AI Appraisal Report

Based on the provided image, I have evaluated this modernist geometric work on paper. Per user submission: attributed to Alexander Calder, with a pencil signature at the lower right and an artist's proof marking near the lower left. Based on what I can see, the piece features a clean presentation of bold primary colors and heavy black ink lines within a double mat and simple black frame. However, I cannot verify from a photo whether this is an autograph gouache, a rare signed print, or a reproduction, as detailed physical inspection of the paper texture, medium, and backing is necessary to determine the exact production technique. The appraisal value estimate of $10,000-$20,000 reflects typical market behavior for a signed work on paper of this type by Alexander Calder, assuming the attribution is correct. Works by this blue-chip artist with strong geometric compositions generally command robust demand in the secondary art market. If physical inspection reveals the piece to be a mere commercial reproduction, offset print, or a work 'in the style of' rather than an autograph piece, the value would drop significantly, likely ranging from $100 to $500 for a decorative framed print. To transition this from an unverified hypothesis to a supported attribution, it would need professional in-person examination by a qualified Calder expert, thorough provenance research, and potentially scientific testing of the paper and ink to rule out modern print technologies.

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