RSSCategory: American Clock Mainsprings

Mainsprings for Seth Thomas Adamantine, 89C Movement

August 14, 2007 | By | Reply More
Mainsprings for Seth Thomas Adamantine, 89C Movement

I just overhauled a Seth Thomas 89C movement for an Adamantine mantel clock (my job no.4401). Both the time and strike mainwheels had significant tooth wear. The mainsprings had the ST logo and may be original, and the thicknesses were .071 for the time spring and .073 for the strike spring. To reduce future wear, […]

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Last updated November 28, 2009

Mainsprings for Seth Thomas Queen Anne, Time and Strike, with Second Hand

August 8, 2007 | By | 2 Replies More
Mainsprings for Seth Thomas Queen Anne, Time and Strike, with Second Hand

I just repaired a Seth Thomas “Queen Anne” wall clock with time and strike movement. It is a large movement (about 7 1/2 inches tall), much larger and heavier than the standard American movement. In Tran Duy Ly’s book “Seth Thomas Clocks and Movements”, the movement is listed as #85, and the mainsprings are specified […]

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Last updated November 28, 2009

Merritt’s Mainsprings P1496

June 19, 2007 | By | 1 Reply More
Merritt’s Mainsprings P1496

I received a new batch of P1496 mainsprings (3/4″ x .0165″ X 96″) from Merritt’s antiques. They are made by a different supplier than the ones I wrote about recently. The ones I really like come packaged as follows: Each spring is wrapped in oiled paper, then in a plastic bag, then in a red, […]

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Last updated November 28, 2009

Mainsprings for Seth Thomas Oak Kitchen Clock

June 15, 2007 | By | Reply More
Mainsprings for Seth Thomas Oak Kitchen Clock

I just overhauled a Seth Thomas called “The Giant, No. 2” shown in Tran Duy Ly’s Seth Thomas book as being made ca. 1904. The movement is 8 day time and strike with inside escapement and is labeled 8 1/4 (this movement model was later called no. 89 and was made in several pendulum lengths […]

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Last updated November 28, 2009

Mainsprings for American 8 Day Clocks

June 12, 2007 | By | 13 Replies More
Mainsprings for American 8 Day Clocks

Many American antique clocks with open (not in a barrel) mainsprings use a “standard” mainspring of 3/4″ wide and approximately 18 thousands of an inch thick. There is a lot of variation in these springs between manufacturers, and across clocks made by the same manufacturer. I will comment more on these variations later. In general, […]

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Last updated November 28, 2009