Hi Ronald,

Thank you for contacting Mearto with your appraisal inquiry.

Seth Thomas was one of the most prominent American clockmakers, operating from the early 1800s through the 20th century. The company was known for producing durable, quality timepieces, including mantel clocks, wall clocks, and tower clocks. Adamantine veneer (often mistakenly referred to as "Adamante") is a type of celluloid-based finish patented by the Seth Thomas Clock Company in 1880. It was designed to simulate more expensive materials like marble, onyx, or exotic woods—at a fraction of the cost.

Unfortunately, the condition of this clock will keep the value on the low side- most Seth Thomas Adamantine Model 5 mantle clocks sell for less than $250-300 if in good condition so this has a fair-market value (based on recent auction sales of comparable examples) of $100-150.

Based on the photos and information provided, and subject to examination, this is:

An antique Seth Thomas Art Nouveau Adamantine and Gilt Metal mantle clock
early 20th Century
The Adamantine veneered case with arched top surmounted by a cast and gilt metal finial, the bulbous body with cast gilt metal mounts centering a while enamel dial with Arabic numeral chapter rings and stamped brass liner, all on short cast gilt metal feet.
Height: 15-1/2 inches; width: 10 inches; depth: 4-1/2 inches
CONDITION: Client advises this is in need of repairs and adjustments, including a broken spring and arms do not move, though the pendulum and other moving parts are operational.
PROVENANCE: Acquired in an online auction
$ 100-150*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia