Articles on: Mechanical Movements

How to tell the age of a Seth Thomas Clock

Seth Thomas clocks are renowned for their quality craftsmanship and historical significance. For collectors and enthusiasts, knowing the age of a Seth Thomas clock can enhance its value and provide deeper insight into its history. Whether you’ve inherited a family heirloom or purchased a piece for your collection, identifying the clock's age involves a few key methods and observations. This comprehensive FAQ article will guide you through the process of dating your Seth Thomas clock accurately.

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**1. Where to Start When Dating a Seth Thomas Clock?**



Begin by examining the physical aspects of your clock. Specific features and markings can help you determine when it was made. Pay close attention to the following:

The Label or Stamp: Check the back of the clock, inside the case, or on the clock face for labels or stamps. Seth Thomas clocks often have a paper label glued inside the case. These labels frequently include the manufacturing date or model number.
The Movement: Look closely at the clock movement itself. Many Seth Thomas clocks have their movements stamped with serial numbers, manufacturing dates, or the company’s logo.
The Clock Case: The style and materials of the case can offer clues. For example:

Wooden gear clocks typically date from 1813 to 1842.

Brass movements became standard after 1850.

Adamantine veneer clocks, which mimic marble, were popular in the late 19th century.

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**2. How to Use the Movement’s Serial Numbers or Stamps**



Seth Thomas frequently stamped movement plates with a date code or model number. Here’s how to decode them:

Date Codes: Movements from the early 20th century often feature a date code. For instance, a stamp like "A-09" could indicate that the clock was made in January 1909.
Model Numbers: Sometimes, clocks have a model number that corresponds to specific production periods. Refer to clock catalogs or historical records for reference.

If you’re struggling to interpret the numbers, Clockworks offers comprehensive **clock repair and restoration services**. Our experts can analyze your clock’s movement and provide an accurate date.



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**3. Identifying the Clock’s Style and Materials**



Seth Thomas produced various styles over different periods. Identifying these styles helps narrow down the production date:

Wooden Gear Clocks (1813–1842): Early clocks featured wooden movements, tall cases, and simple designs. These are some of the oldest Seth Thomas clocks.
[Wall/Mantel Clocks](https://www.clockworks.com/product-category/clock-movements/mechanical-movements/mechanical-clock-kits/wall-or-mantle-clock-kits) (1850–1900): During the mid-to-late 19th century, brass movements became standard. These clocks often had ornate wooden cases, sometimes with inlays or carvings.
Adamantine Clocks (1880–1910): These clocks featured a durable veneer designed to look like marble. The finishes came in black, white, and even vibrant colors.
Regulator Clocks (1860–1920): Popular in schools, offices, and train stations, these clocks had long pendulums and precise mechanisms.
Electric Clocks (1920–1950): By the early 20th century, electric clocks emerged. Seth Thomas adapted to this trend, producing clocks that ran on electricity.

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**4. Consult Clock Catalogs and Reference Guides**



Seth Thomas published catalogs showcasing their clock designs. These catalogs are valuable resources for identifying your clock’s age. Compare your clock to the images and descriptions in historical catalogs to find a match.

You can also invest in reference books specifically about Seth Thomas clocks. Some well-known titles include:

"Seth Thomas Clocks and Movements"* by Tran Duy Ly.
"American Clocks, Volume 2"* by Kenneth Roberts.

These books provide detailed information, including production dates, styles, and historical context.



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**5. How to Date a Clock Using Case Construction**



The construction of your clock’s case offers additional dating clues. Consider these elements:

Joinery: Early 19th-century clocks often used dovetail joints and other traditional woodworking techniques.
Glass: Early clocks may feature hand-blown glass with slight imperfections. Later clocks used machine-made glass.
Finishes: Shellac and varnish were common finishes in the 19th century, while synthetic finishes appeared in the 20th century.

If you need replacement parts for your clock case, Clockworks carries a wide range of clock parts, including bezels and glass, and decorative elements.

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**6. How Accurate Are Online Resources for Dating Clocks?**



Online forums, collector groups, and clock-related websites can be helpful for dating your Seth Thomas clock. Many collectors and experts share their knowledge and experience, which can provide additional insight. However, always verify information through multiple sources or consult a professional to ensure accuracy.

At Clockworks, we offer expert guidance and **repair services** to help you authenticate and date your clock accurately.

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**7. How Can Clockworks Help with Your Seth Thomas Clock?**



Clockworks provides comprehensive services and products for clock enthusiasts, including:

Clock Movements: We offer replacement movements for mechanical and quartz clocks.
Clock Parts: Our extensive inventory includes dials, pendulums, hands, chime rods, and more.
[](https://www.clockworks.com/clock-repair-service.html)Repair and Restoration Services***: Our skilled technicians clean, oil, and repair both antique and modern clocks.
[](https://www.clockworks.com/product-category/all-products/clock-tools)Clock Tools***: We stock specialized tools for DIY clock repairs and maintenance.

Whether you need a new movement, replacement parts, or expert restoration, Clockworks is here to help.



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**8. Tips for Maintaining Your Seth Thomas Clock**



Once you’ve determined the age of your Seth Thomas clock, proper maintenance ensures it remains in top condition. Follow these tips:

Regular Cleaning: Dust the exterior and clean the glass regularly to maintain its appearance.
[Oiling](https://www.clockworks.com/product/high-grade-nye-clock-oil) the Movement: Have your clock oiled every 3–5 years to keep the movement functioning smoothly.

Clockworks offers **repair and restoration services** to keep your treasured timepieces running for years to come.

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**Conclusion**



Determining the age of your Seth Thomas clock requires attention to detail, historical knowledge, and sometimes a bit of expert help. By examining the label, movement, case, and style, you can unlock the history of your clock. Whether you need parts, tools, or professional repair services, Clockworks provides everything you need to keep your Seth Thomas clock in perfect working order.

For more information, visit [clockworks.com](http://clockworks.com) or email us at clockworks@clockworks.com. Let us help you preserve the legacy of your cherished timepieces.

Updated on: 18/12/2024

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