![]() The unit will have a number that would need to be found on this website first to find out what the correct CM length is for it. Moreover, some movements do not have an indication of the pendulum length on the back plate. Various clock retailers may have a stamp of their name on it, but the numbers are always true to the manufacturer. The movement numbers indicate who the actually manufacturer is of the movement. The first step is to identify the manufacturer of the clock movement by using the movement numbers. You will need to cross reference The numbers on the back plate to the pendulum length that you need. When there is no stamp with the CM on the movement, there are some additional steps that need to happen. ![]() To clarify, CM stands for centimeter and PL stands for pendulum length. This length will include the pendulum itself, the leader that it hooks to, and the suspension spring on the top that the leader hooks on to, all in one CM measurement. If it is German, keep in mind the CM length is not the actual pendulum length.Īltogether, German units measure this length from the top of the clock movement, and this includes the three components of the pendulum all in one length, in centimeters. In essence, the numbers will let us know or the stamp will clearly state the CM or PL number. Most mechanical German made clock movements are easy to figure out the pendulum length. Mechanical Clock Pendulum Length for German made movements Generally, there are a few different ways to measure this depending on the country of origin. ![]() Subsequently, this would be the length where it should keep approximate time. It may say CM or PL and this stands for centimeter or pendulum length. Likewise, there may be an indication of how long the pendulum should be in the mix of these numbers. On the back plate of the clock movement usually, there are some numbers and or letters for identification. This will cover most situations, without special equipment to figure out the length. Of course, this is a basic guide to narrow it down to the best pendulum for the clock. If there is no idea what pendulum it would take, this is a basic guide. Hence, getting the mechanical clock pendulum length correct does take some diving into the clock world. A pendulum clock without a pendulum is a shame for sure.
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