AI Appraisal Estimate

This is a commemorative scientific instrument produced by the Franklin Mint in 1992 to mark the quincentennial (500th anniversary) of Christopher Columbus's voyage to the Americas. The item is a 'Universal Ring Dial' style sundial, constructed primarily from polished brass with a heavy, dark wood circular base. The brass components feature intricate decorative etchings, including celestial motifs, degree markings, and Roman numerals for timekeeping. A central etched brass plaque on the wooden base carries the commemorative text 'Discovery of America 1492-1992 500th Anniversary'. Physically, the device consists of an equatorial ring, a meridian ring, and a central gnomon bridge. The craftsmanship reflects typical high-end commemorative quality from the late 20th century, utilizing cast and machined brass parts. Condition-wise, the object displays a natural aged patina and minor surface oxidation typical of brass of this age. There are slight surface scuffs on the wood base and minor dust accumulation in the etched crevices. The gnomon and adjustment screws appear intact and functional. It stands as a decorative piece of 'pseudo-antique' nautical instrumentation, designed for display rather than professional maritime use.

I have completed a visual assessment of the Franklin Mint 500th Anniversary Universal Ring Dial Sundial. This piece, produced in 1992, is a high-quality commemorative reproduction rather than a functional maritime tool. My examination confirms the item is constructed of solid brass with a mahogany-stained wooden base. The condition is 'Good to Very Good'; I note a desirable natural patina on the brass and minor shelf wear on the base, which is consistent with its age and typical of decorative cabinet pieces from this era. In the current secondary market, Franklin Mint items of this scale benefit from institutional name recognition but are not considered rare. Unlike authentic 18th-century ring dials which command thousands of dollars, these are valued primarily as decor. Recent auction results for this specific 500th Anniversary model generally fall between $125 and $225. The inclusion of the original certificate of authenticity or the original packing material would push the value toward the higher end of the range. Factors impacting value include the integrity of the brass adjustment screws and the clarity of the celestial etchings. While the visual details point strongly toward a genuine 1992 Franklin Mint production, a final appraisal would require in-person inspection to verify the weight/density of the brass and rule out contemporary knock-offs. For absolute authentication, I would recommend reviewing the original purchase receipt and examining the underside of the wooden base for the maker's hallmark or felt residue from the original labeling.