About the Seth Thomas “Regulator No. 12” Clock
Title: Seth Thomas Regulator No. 12: A Collectible American Masterpiece
The Seth Thomas Regulator No. 12 is a quintessential example of the company’s commitment to precision and craftsmanship in antique clock production. This model falls under the category of regulators, designed primarily for precise timekeeping rather than decorative purposes.
Typical case materials for the Seth Thomas Regulator No. 12 include mahogany, walnut, and cherry wood, with brass accents on the dial and pendulum. The rectangular case design, featuring a large face and long, slender pendulum, adds an elegant touch to any space.
Production of the Regulator No. 12 spanned roughly from the late 19th century through the early 20th century, making it a popular choice among antique clock collectors seeking pieces from this era.
What makes the Seth Thomas Regulator No. 12 particularly collectible is its combination of aesthetic appeal and exceptional timekeeping accuracy. Its precision movements, combined with the high-quality materials used in construction, ensure that these clocks have stood the test of time both figuratively and literally.
Notable features of the Regulator No. 12 include the intricately designed brass pendulum bob, the Roman numeral dial, and the sweeping second hand, all contributing to its timeless charm and functionality. Additionally, collectors appreciate the signature Seth Thomas clockworks, known for their longevity and reliability, making this model an ideal addition to any serious antique clock collection.
Auction Records and Price History
The following 1 auction record(s) show actual sale prices for the Seth Thomas “Regulator No. 12” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

Seth Thomas Clock Co., REGULATOR No. 12, fine quality timepiece in a Victorian walnut case with hounds tooth trim along the top, 8-day, weight movement with jeweled pallets, c.1881
this case has had some restoration over the years. On the top the two outer diamond shaped pieces are replaced, along with one or 2 of the smaller pieces. The door has two veneer repairs top right and one lower right, chip on top left re-glued. Maybe 20 years ago, after case work, it was refinished to blend colors. The finish has deteriorated and peeled off the wood on the lower door, base trim and top inside the case. The pulley is not ST issue. The mercury jar is a replacement, and needs one slightly larger in diameter. The movement itself is in excellent condition, running briskly, and the engraved silvered dial is very good, lacquer slightly discolored; it would benefit from re-silvering. The nickel finish on the movement is excellent; light reflections look odd to the camera, but it is really fine. Beat scale is original and excellent, however the right support is missing rear tab, and we taped rt side for foto. Good original weight has knurled ends and typical ST hook. Ht 72″
Sold: $46,000 | Date: 5/15/2010 | Source: R. O. Schmitt Fine Arts