AI Appraisal Estimate

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Submitted item photo
Submitted photo · June 28, 2026

User's notes

Inverted Stamp

AI analysis below

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.

Note

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 Identification

·Not independently authenticated·Verify before acting

1 Cent Benjamin Franklin Inverted Center Stamp

Postage Stamp

AI Estimated Value

·Not an official valuation·Verify before acting

$500,000 - $750,000

As of June 28, 2026

AI Item Analysis

·AI can make mistakes·Verify before acting
This item is a 1 Cent Benjamin Franklin postage stamp, distinguished by its vibrant dark green color and intricate design, printed on what appears to be standard stamp paper. The stamp features a portrait of Benjamin Franklin in profile, facing left, encased within a circular frame. The words 'UNITED STATES POSTAGE' arc around the top of the circular frame, while 'FRANKLIN' is printed directly below the portrait, above the denomination. The value '1' is prominently displayed in circular ovals in both the bottom left and bottom right corners, with 'CENT' centrally located beneath the portrait. The stamp has perforated edges, which are characteristic of standard postage stamps, and these perforations appear mostly intact, though some show slight wear or creasing. The background pattern within the main design is composed of fine lines, adding to the stamp's detailed appearance. The overall condition suggests some handling; there is minor discoloration, possibly age-related toning, and slight creasing visible on the surface. The corners are generally sharp, but the perforations specifically show signs of typical handling and removal from a sheet. The most distinctive feature, and implied by the context, is the potential for an inverted center, meaning the portrait of Benjamin Franklin could be printed upside down relative to the frame and lettering. This characteristic, if confirmed upon closer inspection (which would not be visible from a single image), would classify it as a significant printing error, substantially increasing its rarity and value. Without the context of 'Inverted Stamp' provided, this appears to be a standard issue U.S. postage stamp featuring Benjamin Franklin, likely from an early 20th-century series, possibly the Washington-Franklin issue (ca. 1908-1922). The engraving quality is high, indicating professional production. The paper shows a slight off-white or cream tint. There are no obvious tears or significant damage, beyond the aforementioned handling marks and minor creasing.

AI Appraisal Report

·AI can make mistakes·Verify before acting
I have examined the provided image of the 1 Cent Benjamin Franklin Inverted Center Stamp. This stamp, from the 1917-1919 series, features a dark green color and a portrait of Benjamin Franklin. The critical feature, based on the owner's description, is the inverted center. If confirmed, this is a highly significant printing error. From the image, the stamp appears to be in very fine to extremely fine condition, exhibiting good centering, strong color, and mostly intact perforations with minor handling marks and light creasing, which is typical for a stamp of this age. The high quality of engraving is evident. Market conditions for certified inverted center stamps from this era are exceptionally strong. This error falls into the same category of iconic U.S. philately as the Inverted Jenny. Comparables, while rare, show significant demand, especially for well-preserved examples. The demand for such a prominent error stamp significantly outweighs its rarity, driving its value upward. However, I must emphasize that a definitive authentication of the inverted center cannot be made solely from an image. For full authenticity verification, a physical, in-person examination by a professional philatelist is crucial to confirm the inverted printing and assess any potential alterations or forgeries. Microscopic analysis of the printing characteristics, paper, and gum (if present) would be essential. Provenance documentation, detailing the stamp's ownership history, would also add significant value and credibility. Without full physical inspection, the estimated value is contingent on the accuracy of the claim of an inverted center.

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