Ordering a Mason-Sullivan Clock Movement

Ordering a Mason-Sullivan Clock Movement

Ordering a Mason-Sullivan Clock Movement is easy but you may need to convert it to the real number. If an X is at the end of the number that is on the back plate, yoju will need to use the conversion chart.

If the number has no X at the end, you will need to determine who made the clock movement for M/S. This is very easy with the clock movement identification chart. Pay particular attention to Hermle units as that is what they use the most.

The number ends with an X

If there is indeed an X at the end of the number on the clock movement, you need to use the Mason and Sullivan chart. Convert that number to the real manufacturer's number on the chart and write it down. It is best to also put that conversion number inside of the clock case for future reference for ordering any components. When searching for parts or talking about the clock, use the conversion number and not the original that ends with the X.

Why the conversion number helps

The new number will help find keys, pendulums [chains](/product/clock-chain-by-movement-maker), or any other part. The old number makes us blind to all this.

Whereas the conversion number turns on the lights. It will enable the user to talk about the clock and replace the movement. Everything about the movement and its components will be known and help with any future questions.

Converting

Use the Mason and Sullivan conversion chart to get the real movement number and write that number down. Click the number that is by your old number on the chart. It will go to the page where the clock movement is available for purchase. Many movements come in multiple CM lengths and this only has to match both the new and old.

Matching CM lengths

You do not need to measure the pendulum at all during this. The reason is because the numbers and the CM length tell us everything. The CM length stamped on the movement is not the actual pendulum length.

The discussion on how to measure a pendulum is in a different section, but this is not a requirement for replacing. All you need to do is to select the same CM length as the conversion number dictates and it will be the correct unit.

The new movement will run the same pendulum and also every other component that you currently have in the clock. If it is a pendulum unit, you will need to use the drop down menu and select the CM from the list when ordering.

How the new one comes

The movement that will be sent to you will have a different number but it will be the same movement. The new movement comes with the chains or cables and pulleys if it is weight driven.

Ordering a Mason and Sullivan is really not Ordering a Mason and Sullivan after all but you will get the same unit brand new.

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Updated on: 27/12/2024