About the Seth Thomas “Prospect No. 18” Clock
Title: Seth Thomas “Prospect No. 18” Clock Model: A Collectible Mantel Timepiece
The Seth Thomas “Prospect No. 18” is a prized mantel clock model that showcases the exceptional craftsmanship of the renowned American clockmaker. This timepiece falls within the category of mantel clocks, designed to be placed on a shelf or mantel rather than affixed to a wall.
Typically constructed from high-quality hardwoods such as cherry, walnut, or mahogany, the Prospect No. 18 boasts an elegant and intricate design that exudes sophistication. The case is adorned with finely detailed carvings, making each piece a unique work of art.
Produced during the late 19th century (approximately 1874-1900), the Prospect No. 18 was one of Seth Thomas’ most popular clock models due to its exceptional quality and striking appearance. This clock is highly collectible, sought after by antique clock enthusiasts for its combination of aesthetic appeal, historical significance, and reliable mechanical operation.
Notable features include a brass-faced dial with Roman numerals and a finely crafted pendulum visible through the open front of the case. The Prospect No. 18 was available in various weights, with the No. 18 being one of the heavier models, indicative of a larger movement and superior timekeeping accuracy.
The Seth Thomas “Prospect No. 18” is not only a functional piece but also an investment in history and artistry. Its enduring popularity among collectors ensures that it remains a desirable acquisition for those passionate about antique American clocks.
Auction Records and Price History
The following 1 auction record(s) show actual sale prices for the Seth Thomas “Prospect No. 18” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

C.1917, Seth Thomas Clock Co., “Prospect No. 18”, 8-day time/strike mahogany veneered mantel clock in very nice condition with original finish.
The painted metal dial is in exceptional condition. The hands are original. A great clock for the beginning collector. Height 10 inches
Sold: $175 | Date: May 8th, 2004 | Source: R.O. Schmitt Fine Arts