The numbers on the brass back plate of the Mason and Sullivan clock movement is where we need to start with the identification, so we can determine the proper replacement.
The numbers and or letters will tell us everything we need to know. With these numbers we can tell the strike hammer locations, the movement plate size, the hand shaft length and everything else.
So if you have an X in the number that is stamped on the back plate of the clock movement, it’s time to look for this number in the chart located below.
The movement that will be sent to you will have a different number, but it will be the same movement as they are still in production. The new movement comes with the chains or cables and pulleys if it is weight driven, and they all come with the suspension spring and the clock hand nut as well.
A New clock movement will be the same movement you have now but brand new. It is not a cheap unit as a substitute, it is the same movement that are still being made.
Although Mason and Sullivan is out of business, the movements were not their own. They had them made by German manufacturers that are still in business and making the same movements. A new movement will last longer than any repair is able to last, factory lubricated and improved upon, less money than a repair, and comes with a warranty.
On the back plate of the Mason and Sullivan clock movement itself, usually on the low right, you will see some markings with an X at the end of the number.
This is if your clock movement has the Mason and Sullivan number system only. Even though you purchased your clock from Mason and Sullivan, it does not necessarily mean that the movement will be stamped with the Mason and Sullivan numbering system. If you do not have an X in the number, then it is most likely a Hermle movement and you would need to go to that web page.
Solid brass movements that are excellent replacements for movements that are beyond repair or to put in a new clock. Accurately reproduced American style movement with heavy plates, oil sinks and front mount pendulums.
The center shaft / arbor configuration will match up to many original dials.
All styles come either just the movement or you can get it complete with hands, key, gong, gong base and pendulum. The "drop" is the pendulum length from the center of the hand shaft down to the bottom of the rating assembly.
With age, the mechanical clock movements oil solidifies and becomes black and sticky. By the time 20 or 30 years go by, the oil has solidified and is creating wear on the movements brass plates.
If you look at your old clock movement, you will see holes in the brass plates where there are small pivot arbors sticking into these holes. These pivots are what the gears of the clock ride upon and as the pivots spin in the solidified oil, this makes the holes oblong instead of round. With the pivot holes oblong, the holes are pinching the pivots and creating resistance in the gear train. With the solidified oil and the pinched pivots, the clock will eventually stop working or chiming.
This wear takes place in the holes that are in the brass plates and is hard to identify sometimes. These holes in the brass plates become oblong instead of round and this pinches the pivot arbor going into it. Between this, and the solid oil, the clock ceases to function. To have this repaired is an expensive and long process. To have a mechanical movement serviced can cost hundreds, if not over, a thousand dollars and in some cases it can take weeks or months to complete it.
Mason and Sullivan Clock Movements
|Movement #||Chime Type||Driven by||CM length||Handshaft||Picture|
|3212X = KSU78||Triple Chime||Cable Driven||116cm||47mm||Pic|
|3200X = HT116||Triple Chime||Cable Driven||116cm||56mm||Pic|
|3201X = HT116||Triple Chime||Cable Driven||116cm||56mm||Pic|
|3206X = KSU78||Triple Chime||Cable Driven||116cm||47mm||Pic|
|3210X = KSU78||Triple Chime||Cable Driven||116cm||47mm||Pic|
|3211X = KSU78||Triple Chime||Cable Driven||116cm||47mm||Pic|
|3213X = KSU78||Triple Chime||Cable Driven||116cm||47mm||Pic|
|3216X = KSU26(N/A)||Triple Chime||Chain Driven||116cm||47mm|
|3223X = KSU78||Triple Chime||Cable Driven||116cm||47mm||Pic|
|3226X = KSU26(N/A)||Triple Chime||Chain Driven||116cm||47mm|
|3227X = KSU78||Triple Chime||Cable Driven||116cm||47mm||Pic|
|3230X = 461-053 114cm||Westminster||Chain Driven||114cm||53.2mm|
|3231X = 1161-053 114cm||Triple Chime||Chain Driven||114cm||53.2mm||Pic|
|3232X = 1161-853 114cm||Triple Chime||Cable Driven||114cm||47mm||Pic|
|3260X = 451-050 94cm||Westminster||Chain Driven||94cm||33.2mm||Pic|
|3261X = 1161-853 114cm||Triple Chime||Cable Driven||114cm||53.2mm||Pic|
|3262X = 1151-050 94cm||Triple Chime||Chain Driven||94cm||33.2mm||Pic|
|3266X = 351-050 94cm||Westminster||Spring Driven||94cm||33.2mm||Pic|
|3268X = 241-040 94cm(N/A)||Gong Strike||Chain Driven||94cm||33.2mm||Pic|
|3270X = 451-050 94cm||Westminster||Chain Driven||114cm||33.2mm||Pic|
|3281X = KSU80||Triple Chime||Cable Driven||93cm||47mm||Pic|
|3286X = KSU80||Triple Chime||Cable Driven||93cm||47mm||Pic|
|3300X = 141-030K 66cm||Bim Bam||Spring Driven||66cm||33.2mm||Pic|
|3301X = 141-030K 66cm||Bim Bam||Spring Driven||66cm||33.2mm||Pic|
|3304X = 141-040 66cm||Gong Strike||Spring Driven||66cm||33.2mm||Pic|
|3314X = RWS13||Westminster||Cable + Spring||65cm||32mm||Pic|
|3315X = RWS13||Westminster||Cable + Spring||65cm||32mm||Pic|
|3318X = RWU03(N/A)||Triple Chime||Spring Driven||15cm||32mm|
|3319X = RWS13||Westminster||Cable + Spring||65cm||32mm||Pic|
|3322X = 1051-030 43cm||Triple Chime||Spring Driven||43cm||33.2mm|
|3331X =||Westminster||Spring Driven||75cm||33.2mm||Pic|
|3334X = 131-030 55cm||Bim Bam||Spring Driven||55cm||33.2mm||Pic|
|3335X = 241-840 75cm||Gong Strike||Cable Driven||75cm||33.2mm||Pic|
|3337X = 351-020K 55cm(N/A)||Westminster||Spring Driven||55cm||33.2mm||Pic|
|3339X = 131-080 55cm(N/A)||Bell Strike||Spring Driven||55cm||33.2mm||Pic|
|3341X = 141-030K 48cm||Bim Bam||Spring Driven||48cm||33.2mm||Pic|
|3342X = 141-040 38cm||Gong Strike||Spring Driven||38cm||33.2mm||Pic|
|3350X = 141-040 38cm||Gong Strike||Spring Driven||38cm||33.2mm||Pic|
|3352X = 141-040K 38cm||Gong Strike||Spring Driven||38cm||33.2mm||Pic|
|3354X = 351-020 38cm||Westminster||Spring Driven||38cm||33.2mm||Pic|
|3360X = 141-040 23cm||Gong Strike||Spring Driven||23cm||33.2mm||Pic|
|3366X = 351-020 52cm||Westminster||Spring Driven||52cm||33.2mm|
|3370X = 141-040K 48cm||Gong Strike||Spring Driven||48cm||33.2mm||Pic|
|3380X = 141-040 66cm||Gong Strike||Spring Driven||66cm||33.2mm||Pic|
|3390X = 141-040 29cm||Gong Strike||Spring Driven||29cm||33.2mm||Pic|
|3393X = 351-020 25cm||Westminster||Spring Driven||25cm||33.2mm||Pic|
|3396X = 131-080 23cm||Bell Strike||Spring Driven||23cm||33.2mm||Pic|
|3397X = 132-071||Ships Strike||Spring Driven||Balance||33.2mm||Pic|
|3398X = 131-080 23cm||Bell Strike||Spring Driven||23cm||33.2mm||Pic|
|3600X = 350-020||Westminster||Spring Driven||Balance||33.2mm||Pic|
|3602X = 1050-020||Triple Chime||Spring Driven||Balance||33.2mm||Pic|
|3603X = 1050-020||Triple Chime||Spring Driven||Balance||33.2mm||Pic|
|3604X = 150-070||Gong Strike||Spring Driven||Balance||33.2mm||Pic|
|3605X = 350-020||3201X = HT116||Westminster||Spring Driven||Balance||33.2mm||Pic|
|3621X = 341-020 31cm(N/A)||Westminster||Spring Driven||31cm||33.2mm||Pic|