About the Seth Thomas “Sonora Chime Clock No. 266” Clock
Title: Seth Thomas “Sonora Chime Clock No. 266” – A Collectible Masterpiece
The Seth Thomas “Sonora Chime Clock No. 266” is a remarkable mantel clock that stands out in any collection due to its unique design and musical functionality. As a mantel clock, it was designed to be placed on a shelf or tabletop, making it an ideal addition to living rooms and dens.
The typical case materials for the Sonora Chime Clock No. 266 include mahogany, walnut, or oak, giving it a rich, elegant appearance. The clock features a rectangular, ornately carved case with intricate floral patterns that are characteristic of Seth Thomas’ craftsmanship during the late 19th and early 20th centuries.
Produced between 1876 and 1934, this clock model falls within Seth Thomas’ Golden Age, a period marked by exceptional quality, innovation, and artistic design. The Sonora Chime Clock No. 266 is particularly collectible due to its rarity, beautiful casework, and the distinctive Westminster/Whittington chime it produces upon the hour and half-hour.
Notable features of this clock include a hidden shelf on the back for storing small items, a hooded dial with Roman numerals, and a brass-faced movement with a pendulum visible through an ornamental opening in the lower door. The musical chime mechanism, activated by a pull cord, adds to its charm and collectibility among antique clock enthusiasts.
The Seth Thomas “Sonora Chime Clock No. 266” is not only a functional timepiece but also a stunning work of art that showcases the exceptional craftsmanship and innovation of the Seth Thomas Clock
Auction Records and Price History
The following 1 auction record(s) show actual sale prices for the Seth Thomas “Sonora Chime Clock No. 266” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

Seth Thomas 4 bell, “Sonora Chime Clock No.266”, ca 1915.
This is a large beehive case that stands 18 1/2 inches high. Fine figured mahogany wood is clean, polished, and in near perfect condition. Dial is silver with recessed numerals, slightly soiled, but with little wear. Bowed and beveled glass. Chime-Silent lever on the side. The chime movement is marked “90A”, the running movement “89N”. The movements are clean and running. Ly-Seth Thomas No.691, 693, 696, 697.
Sold: $680 | Date: July, 2002 | Source: Horton’s Antique Clocks


