https://antiqueseththomas.com Sat, 15 Aug 2026 05:45:43 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.1 https://antiqueseththomas.com/antique-seth-thomas-bay-state-adamantine-mantel-clock-4-column-runs-with2-keys/ https://antiqueseththomas.com/antique-seth-thomas-bay-state-adamantine-mantel-clock-4-column-runs-with2-keys/#comments Mon, 03 Aug 2026 05:19:46 +0000 https://antiqueseththomas.com/antique-seth-thomas-bay-state-adamantine-mantel-clock-4-column-runs-with2-keys/

















Antique Seth Thomas “Bay State” Adamantine Mantel Clock – Running, with Original Keys. Offered here is a genuine antique Seth Thomas mantel clock in their “Bay State” Adamantine case style – confirmed by the original stenciled model name still visible on the case back, along with the factory label. This is a handsome four-column Victorian-era shelf clock and a great piece for a collector or someone furnishing a period home. Model: “Bay State” – Adamantine line (case-back stencil confirms model name). Case: Black Adamantine (celluloid veneer over wood) finish with faux marble/tortoiseshell mottled panels on the plinths and crown. Two pairs of full round Corinthian columns with copper-toned cast metal capitals and bases. Cast bronze griffin/mask side ornaments with ring pulls (decorative “lifting handle” motif). Ornate gilt brass fretwork bezel surrounding a porcelain numeral dial, signed Seth Thomas Clock Co. Cast metal scroll feet. Original case-back label reads “Adamantine Clock, Patented September 7, 1880, ” Label No. Includes the original pendulum bob and both period brass winding keys. Age: Seth Thomas’s Adamantine line ran from the early 1880s through roughly 1910s; based on the case style and movement type, this example most likely dates to the 1880s-1900s. Condition: Clock does run, but needs a cleaning in order to keep time and strikes correctly. As with virtually all century-plus-old clocks, it has not been serviced recently and would benefit from a professional cleaning/oiling by a clock repair specialis. Please see photos for cosmetic condition, including some expected age-related wear/chipping to the Adamantine veneer at the top corners and minor wear/tearing to the original paper label on the back. No major cracks or losses to the columns or ornaments. Dimensions: 16.5″ wide, 7′ depth, 11.5″ high. What’s included: Clock, pendulum, 2 winding keys.

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This antique Seth Thomas brown wood mahogany analog mantel clock, dated 1934, comes with 2 keys and features a mechanical movement. The clock is a vintage piece from the early 20th century, with a Westminster chime sequence and a stylish mahogany finish. Perfect for any room, this original clock adds a touch of vintage charm to any space with its classic design and key-operated function. I done know if it keeps good time but it does chime on the hour and half hour.

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This antique Seth Thomas mantle clock, from the Victorian era, is a true piece of history. With a rectangular shape, lion head, and six column design, it exudes an antique style that collectors will appreciate. The clock is key-operated and features a non-numeric marking for its number type, adding to its unique character. The clock has been well-preserved and is in excellent working condition. Its mechanical movement allows for accurate timekeeping and the clock face displays analog time. This Adamantine model is an original piece, manufactured by Seth Thomas in 1880. It’s a valuable addition to any antique clock collection and is sure to be a conversation starter. Flaws: front left foot has been broken and repaired. Sits flat and measures balanced. Does not effect pendulum movement. Please see attached photos for more details.

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