Instructions for a Kundo Anniversary 400 Day Clock

The Kundo Anniversary 400 Day Clock, made by German manufacturer Kieninger & Obergfell, was originally produced in 1923. The word anniversary symbolizes the idea that the clocks only need to be wound once a year on a meaningful date, such as the date you received the clock. However, in reality, your clock may need to be wound as soon as nine months or as late as 13 months. This clock is made with either a fixed pendulum that must be released for the clock to operate or a removable pendulum that simply hangs in place. As these clocks are mechanical, they may not be as accurate as modern-day quartz clocks.

Silver wall alarm clock.
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Instructions for a Kundo Anniversary 400 Day Clock

Unpacking and Assembling

Take care when unpacking your Kundo clock, and lay out all five parts before you begin assembly. The box should include the clock with the base, a pendulum, a key, the glass dome and an extra suspension spring. If a piece appears to be missing, check your wrapping as it may have been missed during your initial unpacking.

To begin assembly, place your clock upright on a flat surface. It should be resting on its base. Loosen the pendulum screw, move the guard up to the highest position, then secure it in place by tightening the screw. A spring will now descend, and this will help with your next step, pendulum suspension. Take your time with this, making sure you don't twist or bend the wire spring. To suspend your pendulum, carefully slide the small bar on the bottom of the spring into the slot at the top of the pendulum assembly. Confirm that the center bar of the pendulum is within the small cup located at the base.

Operating Your Clock

Before you set the clock, move it to its permanent location. Choose a spot without vibration, steering clear of TVs, pianos or even unsteady tables. Do this carefully and check that the pendulum is still perfectly centered – the bar of the pendulum should be in the center of the cup. If it's not centered, readjust the pendulum. An off-centered pendulum will hit the rim of the cup and stop. Your clock should come fully wound, so to start it, simply swing the pendulum by gently touching it with your finger. Set the time by moving the minute hand around the face until the time is correct.

Regulating the Time

If your clock runs too fast, move the time regulator clockwise. If your clock runs too slow, move the time regulator counterclockwise. When moving this piece, use your other hand to hold the pendulum, ensuring the fragile wire suspension spring isn't damaged.

The Final Step

Gently place the glass dome over your clock. To keep the glass clean, regularly wipe it with a clean, damp cloth while the glass remains over the clock. If you need to remove the glass for a more thorough cleaning, gently yet securely grip it as close to the bottom as possible. Wash the dome in very hot water then wipe dry with a clean cloth.


To keep your clock running smoothly, maintenance is necessary from time to time. This should be handled by a professional. Every three years, bring your clock in for an inspection and lubrication. An expert will examine all parts and clean or replace what's necessary. They'll also lubricate all pivots and points of contact. Your clock should receive an overhaul every five to seven years. This includes a full disassembly of your clock so each part can be properly cleaned, inspected and replaced if necessary. The clock's timekeeping ability should also be tested and adjusted at this time. When properly maintained, your clock will never stop running.