About the Seth Thomas “Master Clock M” Clock
Title: Seth Thomas “Master Clock M” – A Collector’s Gem
The Seth Thomas “Master Clock M,” often abbreviated as the MTM, is a coveted mantel clock model from the esteemed American clockmaker, produced primarily between 1876 and 1900. This timepiece stands out due to its exquisite design and exceptional craftsmanship, making it a desirable acquisition for antique clock collectors worldwide.
The MTM is distinguished by its grandiose yet elegant case design, typically constructed from highly polished walnut or mahogany woods. The clock features an intricate open dial with Roman numerals and finely crafted hands, all enclosed within a handsome brass-framed bezel. The base of the clock is adorned with decorative brass accents, further emphasizing its opulence.
What sets the Seth Thomas Master Clock M apart as a collectible piece is its combination of aesthetics and mechanical precision. The clock’s 8-day, weight-driven movement ensures reliable timekeeping while showcasing the watchmaker’s artistry. Notable features include an intricate pendulum bob with a brass finial and a striking silvered dial with applied Arabic numerals.
For enthusiasts of antique American clocks, the Seth Thomas Master Clock M offers more than just accurate timekeeping. Its impressive design, premium materials, and historical significance make it an essential addition to any collection, while its rarity in excellent condition adds to its allure among discerning collectors.
Auction Records and Price History
The following 1 auction record(s) show actual sale prices for the Seth Thomas “Master Clock M” 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., “Master Clock M” wall clock, 8 days, time only, weight driven movement in an oak case with 18″ painted metal dial signed “MASTER REGULATOR, PETTES & RANDALL CO. NEW YORK”, c1922
the outside of the case has a great alligatored original finish. The inside of the case has a later glossy finish. The case and dimensions are identical to the model “Regulator No. 31″ and there is evidence in this clock where parts of the master clock have been removed {holes neatly filled}. The mounts for the dial surround are replacements. The pendulum stick is a period ST replacement with impulse plate moved to fit this movement. The five small rear finials are absent. The four front finials are present. The damascened pendulum bob and weight are Seth Thomas issue and nickel plated. Whether viewed as the Master Regulator or a Regulator #31, this is still an uncommon Seth Thomas model, large and impressive. Ht 68”
Sold: $2,800 | Date: October 26, 2013 | Source: R. O. Schmitt Fine Arts