Seth Thomas Regulator No. 18. Wall regulator. Wall clock.

This is the grand-daddy of the school clock form. A form which all American clock collectors recognize. This large mahogany case wall clock measures approximately 54 inches long, 20.25 inches wide and 5.5 inches deep. Big regulators like this one are visually pleasing. The gentle motion of the pendulum is a sight to see.

This example retains an original dry finish that has lightly crazed over it’s surface. The painted dial measures 14 inches in diameter and is painted on a zinc pan. It is in excellent original condition which is remarkable for a Seth Thomas clock. The dial features a time track that displays the hours with Roman numeral figures, a subsidiary seconds dial located above the center arbor, the Maker’s name printed in block lettering is displayed just above the six o’clock hour and the statement, “MANUFACTURED IN THE UNITED STATES OF AMERICA” below the time ring. This dial is in very good original condition. The movement is brass and is very good quality. The movement is weight powered and is designed to run eight days on a full wind. It incorporates both a “Graham Deadbeat escapement” and “maintaining power.” This movement is secured to the case by an iron bracket that is screwed to the backboard. The pendulum also hangs from this location. It is constructed with a wooden rod and a large brass covered bob. It is designed to compensate for changes in temperature. The bob is decorated with an engraving. It is treated with a nickel finish. The weight is also brass and treated with a nickel finish that matches the finish found on the bob. Someone has moved the swing indicator up out of the bottom of the case. We have decided to leave it in it’s present location because I find it interesting mounted in it’s present location. It would be easy to move it back if one wished.

This clock was made circa 1905. It is inventory number 215078.

About Seth Thomas of Plymouth and later Thomaston, Connecticut.

Thomas was born in Wolcott, Connecticut, in 1785. He was apprenticed as a carpenter and joiner, and worked building houses and barns. He started in the clock business in 1807, working for clockmaker Eli Terry. Thomas formed a clock-making partnership in Plymouth, Connecticut with Eli Terry and Silas Hoadley as Terry, Thomas & Hoadley.

In 1810, he bought Terry’s clock business, making tall clocks with wooden movements, though chose to sell his partnership in 1812, moving in 1813 to Plymouth Hollow, Connecticut, where he set up a factory to make metal-movement clocks. In 1817, he added shelf and mantel clocks. By the mid-1840s, he changed over to brass from wooden movements. He made the clock that is used in Fireman’s Hall. He died in 1859, whereupon the company was taken over by his son, Aaron, who added many styles and improvements after his father’s death. The company went out of business in the 1980s.


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