AI Appraisal Estimate

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Submitted photo · June 13, 2026

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AI appraisal

AI analysis & estimate

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Everything below 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 Identification

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Seth Thomas Mahogany Tambour Mantel Clock with Marquetry Inlay

Antique Horology / Clocks

AI Estimated Value

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$175 - $250

As of June 13, 2026

AI Item Analysis

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This is a vintage Seth Thomas mantel clock featuring a classic arched or 'tambour' style wooden case made of mahogany. The wood displays a rich, dark reddish-brown hue with a visible fine grain. Centered on the lower portion of the wooden facade is a delicate floral marquetry inlay with leaf-like scrolls, likely made of satinwood or boxwood. The circular clock face is protected by a domed glass crystal set within a brass or gilt-metal bezel. The dial itself is off-white or cream-colored, aged with a light yellow patina, and features stylized black Arabic numerals. Notable markings include the 'Seth Thomas' brand name below the 12 o'clock position and the text 'MANUFACTURED IN THE UNITED STATES OF AMERICA' printed along the bottom edge of the dial. The clock hands are ornate, black-painted metal, and the face includes two winding arbors positioned between the 4 and 5 o'clock and the 7 and 8 o'clock markers, indicating an 8-day time and strike movement. The case sits on a tiered rectangular base with small round metallic feet visible at the bottom. This clock likely dates to the early 20th century, approximately 1910-1930. The condition appears well-preserved with minor surface wear, some light scratching on the wooden finish, and typical oxidation on the brass bezel and internal winding points.

AI Appraisal Report

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I have virtually examined this Seth Thomas Mahogany Tambour Mantel Clock, dating primarily from the 1910s to the 1920s. The piece showcases a classic 'No. 8' style tambour aesthetic, enriched by a floral marquetry inlay that elevates it above standard plain mahogany models of the era. The dial confirms its American manufacture and retains the original Arabic typography and spade hands. Based on visual assessment, the case remains in good condition with a pleasing patina, though the slight oxidation on the bezel and minor finish abrasions suggest it has not been professionally restored recently. The market for early 20th-century American tambour clocks is currently saturated, which tends to suppress prices. While Seth Thomas is a highly regarded name, these were mass-produced. The valuation is buoyed by the inlay, which is more desirable than the standard wood-only versions. Recent auction comparables for inlaid Seth Thomas tambours range from $150 to $300 depending on mechanical functionality. Several limitations exist in this remote appraisal. A physical inspection is required to verify the movement's integrity, specifically the condition of the mainsprings, pivots, and the presence of the original pendulum and key. Value is heavily dependent on whether the clock produces a clear, rhythmic strike and maintains accurate time. I cannot verify the authenticity of the internal clockworks or detect hidden repairs to the wood or gear teeth without a manual teardown. For a definitive valuation, I recommend an in-person assessment by a horologist to confirm the '8rd' (8-day) movement's mechanical health and internal markings.

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