What Is the Hermle 1050-020?

How Does the Hermle 1050-020 Work?

The Hermle 1050-020 is a powerful and compact mechanical clock movement used in many wall/mantel clocks made from the 1970s to the early 2000s. If you’ve opened the back of your chiming clock and found “1050-020” stamped on the brass plate, you’re dealing with a solid German-made unit known for its reliability and triple chime function. In this article, we’ll explore what makes the Hermle 1050-020 unique, how to identify it, when to replace it, and how to install a new one correctly.

What Is the Hermle 1050-020?

The Hermle 1050-020 is an 8-day spring-driven mechanical clock movement with triple chime capability. It features balance wheel regulation, which means it does not require a pendulum to operate. Instead, it uses an internal balance assembly to regulate time—similar to a watch or marine chronometer.

This makes the 1050-020 ideal for smaller or portable clocks where a swinging pendulum isn’t practical. The movement plays three different chime melodies—Westminster, Whittington, and St. Michael—on the quarter hour and strikes the hour count at the top of the hour.

What Makes the 1050-020 Different from Other Hermle Movements?

Several features set the 1050-020 apart from other Hermle movements:

• Balance Wheel Regulation: Unlike pendulum-driven movements, this unit uses a balance wheel for timing. That means you don’t need to worry about leveling the clock case or adjusting pendulum length.
• Triple Chime Selection: You can choose between three chime melodies using a selector lever—something not available on many simpler units.
• Compact Design: This movement fits into smaller clock cases like bracket, tambour, or mantel clocks.
• High-Quality German Craftsmanship: Like all Hermle movements, the 1050-020 is made in Germany with brass plates and hardened steel pivots for long-term durability.

How Can I Identify a Hermle 1050-020 Movement?

You’ll find the movement number engraved on the back plate of the unit. Look for the numbers “1050-020” followed by the pendulum or balance notation (which in this case will typically say “balance”).

If you see “1050-020” stamped into the metal, along with the Hermle logo and “Made in Germany,” you can safely assume it’s the correct model.

What Clocks Use the 1050-020?

You’ll find this movement in a wide range of mantel clocks/wall clocks, and carriage clocks, especially from respected brands like Howard Miller, Emperor, Seth Thomas, and other American manufacturers that used Hermle as their OEM movement provider.

Collectors and restorers often appreciate this model because of its balance regulation—it keeps good time regardless of case position.

When Should I Replace the Hermle 1050-020?

If your Hermle 1050-020 movement is:

• Slowing down or stopping randomly
• Chimes are out of sync or muted
• Won’t strike the hour count correctly
• Hasn’t been cleaned in over 15 years

…then it’s likely time to replace the movement.

These mechanical units wear over time, especially in the pivot holes and gear teeth. Eventually, even regular oiling won’t restore proper function. Instead of spending hundreds of dollars on a full teardown and rebuild, most people choose to replace the unit entirely.

A brand-new Hermle 1050-020 movement comes factory-lubricated, time-tested, and ready to install—offering decades of smooth, reliable operation.

How Do I Install a Replacement Hermle 1050-020?

Replacing this movement is easier than it may seem. Follow these steps:

1. Take clear pictures of the movement inside your clock before removing anything. Capture all wiring, hand positions, and chime rod setup.
2. Remove the hands, dial, and mounting hardware.
3. Unclip or unscrew the old movement carefully.
4. Install the new 1050-020 movement in the same position using the existing mounts or updated brackets (included in most orders).
5. Reattach the chime rods, hammers, and hands, referencing your earlier photos.
6. Wind the movement fully and test all three chimes to ensure correct alignment.

Most installs take less than an hour for an experienced clock technician or hobbyist. If you need help, we offer detailed instructions and support.

Can I Repair the Old Movement Instead?

You can repair the old unit, but for most customers, it’s not cost-effective. Full restoration requires bushing work, ultrasonic cleaning, pivot polishing, and more—and that’s before labor costs. Because new 1050-020 movements are still being manufactured by Hermle in Germany, most people choose the quicker and more affordable route: direct replacement.

That said, if the clock has strong sentimental value and you want to keep the original movement, we do offer full-service professional repairs.

Do I Need Special Tools?

You’ll only need basic tools for this installation:

• Screwdriver set
• Clock hand puller
• Pliers
• Clean workspace with good lighting

Avoid forcing any parts. If something doesn’t fit right, contact our team—we’ll help troubleshoot.

Conclusion

The Hermle 1050-020 continues to be one of the most versatile and trusted spring-driven clock movements available. With its triple chime options, compact balance regulation, and decades of reliability, it remains a top choice for restoring or upgrading wall and mantel clocks.

If your movement has seen better days, don’t wait for it to stop ticking altogether. Replace it with a factory-fresh unit and enjoy beautiful chimes and accurate timekeeping once again.

For expert help, instructions, or to order your replacement, visit clockworks.com or email clockworks@clockworks.com.

Updated on: 04/10/2025