Category: American Clock Mainsprings
Many American antique clocks had mainsprings that were too strong when they were new. For many years, the so called “standard” mainspring size was 3/4″ by .018″ by 96″, and new mainsprings of this size will cause wear to the mainwheel teeth. In this section I give examples of better mainsprings to use for new replacements. It is best to keep the original old mainsprings in some cases, and I give examples of this, too.
A New Mainspring for Seth Thomas No. 89 and Other American Clock Movements
Ansonia Black Iron Mantel Clock
Ansonia La Layon Royal Bonn Porcelain China Mantel Clock
Gilbert Tambour Mantel Clock with Bim-Bam Hour Strike
Seth Thomas Sentinel No. 4 Tambour Mantel Clock
Seth Thomas Small Mahogany Adamantine Mantel Clock
Seth Thomas Beehive Mantel Chime Clock with No. 124 Movement
Seth Thomas Tambour Clock with Quarter Hour Strike, 1939
Gilbert 8-Day Cottage Clock
Plymouth by Seth Thomas Round Top Mantel Clock, 1940
Waterbury “Admiral” 30-Day Round Drop Oak Cased Wall Clock
Jahresuhrenfabrik (JUF) 400 Day Clock ca. 1912 with Disc Pendulum
Seth Thomas Adamantine Mantel Clock, 1895, Beautiful Tan with Deep Red and Orange Swirls
Seth Thomas Adamantine Mantel Clock with 89C Movement
Ansonia “Burton” Oak Kitchen or Shelf Clock
Gilbert “Consort” Oak Long Drop Octagon Wall Clock
Seth Thomas Adamantine Mantel Clock with Mainspring Broken in 22 Pieces!
Sessions Store Regulator Clock in Oak Case
Seth Thomas Rosewood Drop Octagon (Schoolhouse) Clock
Sessions Oak Cased Drop Octagon (Schoolhouse) Clock
E. N. Welch Hanging Oak Kitchen Clock
Sessions Black Mantel Clock, Early
New Haven Clyde Walnut Kitchen Clock, ca. 1885
Waterbury Niagara Oak Calendar Shelf Clock, ca. 1911
Seth Thomas Sentinel No. 19 Tambour Mantel Clock
Ansonia Enameled Iron Black Mantel Clock
Seth Thomas Adamantine Mantel Clock, 6 Half-Pillar, Black and Marbleized
1939 Plymouth (by Seth Thomas) Tambour Mantel Clock with Quarter Hour Strike
