https://antiqueseththomas.com Sun, 23 Aug 2026 18:02:45 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.1 https://antiqueseththomas.com/seth-thomas-adamantine-mantel-clock-adamantine-finish-19th-20th-century-pillars/ https://antiqueseththomas.com/seth-thomas-adamantine-mantel-clock-adamantine-finish-19th-20th-century-pillars/#comments Fri, 21 Aug 2026 05:57:46 +0000 https://antiqueseththomas.com/seth-thomas-adamantine-mantel-clock-adamantine-finish-19th-20th-century-pillars/














The Seth Thomas Adamantine Mantel Clock is an antique piece from the Victorian era, showcasing a unique adamantine finish on its wooden frame. This clock is a valuable addition to any collector’s display, featuring a mechanical movement and a rectangular shape typical of mantel clocks. With a custom bundle that includes pieces from renowned brands like Gilbert, Waterbury, and Sessions, this clock exudes vintage charm and authenticity, making it a sought-after decorative collectible for enthusiasts of antique timepieces. Truly a beautiful piece!

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Antique Seth Thomas Mantle Clock Adamantine 6 Pillar Lion Heads and a vintage architectural design and victorian aesthetic. I allow this clock to run for 24 hours it chimed on the half hour and the number of hours. I will add a winding key. Please review the detailed attached detail pictures for condition of this item. Measuring 11.5″ tall, 17″ across and 6.5 deep. The case is in very good condition with very few marks. The finish is in very good condition. The case hardware appears to be in good condition. The 4.5 metal dial appears in good condition with minor aging. The hinged 5.5 bezel and glass are in very good condition. Designed to strike on a bell every half hour and on a gong every full hour.

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The Seth Thomas Antique Adamantine Mantel Clock is a vintage timepiece from the United States, featuring a classic brown color and antique style. This original piece showcases the craftsmanship and design of a bygone era, making it a unique and charming addition to any antique collection or home decor. Perfect for those who appreciate traditional and timeless pieces, this mantel clock exudes a sense of history and elegance. Original key with it, in good working condition.

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This is one of Seth Thomas’s Sonora chime clocks with the adamantine case, and 8 day movement. Cosmetically it’s very good with a some blackened corner dings and maybe a scuff or two, but nothing to point out specifically. Mechanically the clock is mostly untested. Both movements were wound and it was allowed to run while it was being listed. It chimes when the hands were cycled. This is a rare clock and not a run of the mill Sonora. It’s priced to sell so don’t miss it!

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This Seth Thomas Mantle Clock features a dark mahogany finish and is designed in the tambour or “napoleon hat” style. Clock is 16.25″ wide at base and 9″ tall. Working condition when wound up. (See videos) Just not sure if the number of “dongs” is correct. It is likely from the early 1900s to 1920s and may have an 8-day mechanical movement. Similar models often feature time-and-strike functionality, though they may require a winding key to operate. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. Condition as shown in photos. There is one knob foot missing from the bottom. Includes pendulum bob and key. Has personal inscription on the back door showing that it was a gift given in 1921.

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It’s ticking (maybe just a little fast) with a light push to the pendulum and the bell dings too. No wind up key included. A classic Seth Thomas Adamantine mantel clock in the popular temple-style case with green faux-marble (adamantine celluloid) finish and paired cream-colored marble columns – one of the most iconic American shelf clock designs of the late Victorian and Edwardian era, made at the Seth Thomas factory in Thomaston, Connecticut (established 1813). Brand: Seth Thomas – dial reads Made by Seth Thomas in U. Adamantine celluloid finish in deep green with white veining over wood case. Six decorative cream marble-finish columns flanking the dial. Ornate brass feet with scroll detail, brass dial surround with egg-and-dart bezel. Original paper dial with Arabic numerals. 8-day brass spring-driven movement with bell strike, pendulum and coiled gong present. Original paper directions label still adhered to rear of case (torn but legible). Part label number visible: 295-C M. The case shows expected age and honest wear: the adamantine finish has surface crazing, chips, and losses consistent with 120+ years of display; the rear of the case is dusty and has some white residue. The movement is present and appears intact with all visible gears, the bell, pendulum bob, and coil spring, but has not been tested and should be serviced by a clockmaker before use. Overall a handsome, displayable example of a sought-after American antique clock.

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Up for sale is a stunning Seth Thomas Adamantine mantle clock in the highly sought-after Burl Walnut marbled brown finish. This patented celluloid veneer replicates the rich grain of burl wood and has maintained its deep luster for over a century. Features classic architectural styling with ornate lion head side handles and decorative pillars. Movement: Original Seth Thomas 89C movement. Timekeeping: The clock is in running condition and keeps time well. Strike Function: 8-day time and strike mechanism. Note on Strike: When fully wound, the strike side runs continuously. Once the tension settles, it strikes the hour and half-hour correctly. This is a common adjustment issue often solved by a professional cleaning or a minor lever tweak. Key/Pendulum: Includes the original pendulum. No key is included, but it has been tested with a Size #5 key. Exterior & Structural Condition. Case: The Burl Walnut finish is in excellent antique condition with beautiful marbling. Hinge Repair Needed: The front brass bezel hinge is broken and requires repair (please see close-up photos). Currently, the bezel does not stay properly aligned/attached at the hinge point. Hardware: The brass-tone feet and lion handles show a lovely, authentic aged patina.

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Antique Seth Thomas Adamantine 8 Day 4 Column Mantle Clock. The clock is in very nice overall condition. We wound it and set the time and it ran for a day before it was listed. The clock is in nice cosmetic condition for its age. It was recently oiled and is ready to display. 17.5″ long (at the feet) by 11 3/4″ tall by 7 deep.

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1895 Antique Seth Thomas Clock Adamantine. Working Might Need Light Servicing.

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1880 SETH THOMAS Victorian-era Brown Adamantine Wood Grain finish Mantel Clock with brass column details. The clock is in working condition, which will need adjustments especially after transport. The key is included (not original key). Ma nufacturer: Seth Thomas Clock Company, Thomaston, Connecticut, USA.

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