About the Seth Thomas “Regulator No. 1 Extra time only” Clock
Title: Seth Thomas Regulator No. 1 Extra Time Only – A Collector’s Delight
The Seth Thomas Regulator No. 1 Extra Time Only clock is a quintessential piece for antique clock collectors, representing the company’s commitment to precision and craftsmanship. This model falls under the category of regulators, designed primarily for precise timekeeping rather than decorative purposes.
Typical case materials for the Regulator No. 1 include mahogany or walnut woods, with intricate veneer patterns that add an air of elegance to any room. The clock’s design features a tall and slender profile, with a dial encased in a rectangular, glazed wooden box. The pendulum, visible through the lower glass section, adds a captivating element to the piece.
Produced during the latter half of the 19th century (approximately between 1870 and 1900), this clock model is a testament to Seth Thomas’s industrial prowess during the American clock-making boom. The Regulator No. 1 Extra Time Only is particularly collectible due to its superior timekeeping abilities, distinctive design, and historical significance as one of Seth Thomas’s earliest regulator models.
Notable features include the enamel dial with Roman numerals and a seconds hand, which was unusual for the time, indicating the clock’s emphasis on precision. The presence of the “Extra Time Only” inscription on the dial signifies that this particular model is designed to run consistently faster than standard time, requiring periodic adjustments to maintain accuracy.
In summary, the Seth Thomas Regulator No. 1 Extra Time Only is a must-have for antique clock enthusiasts. Its distinctive design, historical significance, and exceptional craftsmanship make it an invaluable addition to any collection.
Auction Records and Price History
The following 1 auction record(s) show actual sale prices for the Seth Thomas “Regulator No. 1 Extra time only” model clock. Prices vary based on condition, originality, and current market demand. Search for more records on AntiqueClocksPriceGuide.com.

Antique Seth Thomas Regulator No. 1 Extra time only Clock
Jul 2020 – 158 Antique American Clocks Seth Thomas “Regulator No. 1 Extra”, ca. 1875. An absolutely gorgeous case veneered in rosewood with just a couple of good repairs on the bezel. Unfortunately, there are several significant issues. There is no lower glass; you will need to have one cut and painted in the ST No. 1 design. The pendulum bob is a cheap replacement and you will need to find an ST pendulum bob. The weight is from a Howard No. 70 and is so marked. The bottom weight shield board, which normally displays a beat scale, is missing. The seconds bit is an improper replacement. Note that there is some minute flaking to the painted dial. This example has the early round movement made by S.B. Terry and is signed only with an It is running without issue. If this clock had the lower glass and correct bob I would expect $1200-$1500. $600-$1000.
Retail: $630 | Date: 07/01/2020 | Source: AntiqueAmericanClocks.com