Black Adamantine Appraisal

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Victorian Era Seth Thomas Black Adamantine Mantel Clock

This is a late 19th-century Victorian mantel clock, likely manufactured by Seth Thomas, a renowned American clockmaker. The case is constructed using 'Adamantine,' a high-quality celluloid veneer developed in the 1880s to mimic black marble and slate. The clock features a rectangular architectural form with a stepped top and base. Flanking the dial are two ornamental columns with faux marbleized (ochre/brown) caps and bases, accented by gold-tone or brass-finished pilasters featuring neoclassical decorative motifs. The clock face is a circular, aged brass or gilded dial with stylized Arabic numerals, featuring two winding apertures and a central concentric ring design. The hands appear to be a simple spade style, showing signs of oxidation. The entire piece sits on four cast-metal scrolling feet with a brass-colored finish. Regarding condition, the piece shows significant signs of age and patina. There is visible wear and grime on the dial, minor surface scratches on the black Adamantine finish, and some possible flaking or loss of the marbleized finish on the column accents. The gold-tone elements and metal feet show dulling and oxidation consistent with an age of approximately 120-140 years. The base displays faint incised decorative scrolling or stars. This style of clock was staple of late Victorian middle-class homes, valued for its durability and formal appearance.

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$150 - $250

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