About the Seth Thomas “Adamantine No. 102” Clock
Title: Seth Thomas “Adamantine No. 102” Clock Model Overview
The Seth Thomas “Adamantine No. 102” is a captivating mantel clock that showcases the company’s dedication to craftsmanship and innovation during the late 19th century. This model falls under the category of mantel clocks, designed for placement on furniture rather than mounted on walls or large upright regulator clocks.
The “Adamantine No. 102” is renowned for its distinctive case, primarily constructed from brass and ornamented with intricate floral patterns, giving it a luxurious and elegant appearance. The case design is characterized by the use of Adamantine, an early form of nickel-plated metal that was popular during this era due to its ability to resist tarnish and corrosion. This feature not only enhances the clock’s aesthetic appeal but also ensures its longevity.
Produced between 1880 and 1925, the “Adamantine No. 102” represents a significant period in Seth Thomas’ history when they were pioneering new manufacturing techniques and materials to create clocks that combined functionality with exquisite design. This model is highly collectible due to its rarity, high-quality craftsmanship, and historical significance as an example of American industrial ingenuity during the Victorian era.
Notable features of the “Adamantine No. 102” include a beautifully designed dial with Roman numerals and finely crafted hands, a weight-driven movement, and a well-balanced overall design that exudes elegance and sophistication. For collectors, this clock offers an opportunity to own a piece of American horological history, combining both aesthetic appeal and mechanical precision.
Auction Records and Price History
The following 1 auction record(s) show actual sale prices for the Seth Thomas “Adamantine No. 102” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

Seth Thomas Clock Co., Thomaston, Conn., No. 102 Adamantine 8 day, time and strike mantel clock, 1895
The model number is identified on the rear factory label, and the date code for 1895 is on the base of this mantel clock in very nice overall condition. There is an old copper patina on the metal feet, lion handles and flat columns, and the embossed brass dial retains its shine. The movement ticks and strikes on a deep gong, but may need cleaning. Ht 11″
Sold: $95 | Date: April 22, 2012 | Source: R. O. Schmitt Fine Arts