Square, Westminster chime, chain driven movement will say on the back plate something similar to 79 SKS 116CM or 80 SK 116cm.
The hammer location on these are either 8 (4-4) on the back of the unit, or 5 hammers on the side. The movements hand shaft is 36mm from the front plate all the way out to the very end of the minute hands rating nut threads.
This high quality German movement comes pre oiled and includes its chains, leader, suspension spring and hand nut.
Removal of this movement is easy and we provide instructions for the installation. This movement is in stock and can ship today. We are full time clock makers and retailers both, so if you need any assistance with install we can help.
Replacing a movement is less costly than a overhaul. These movements last 25 years before needing an over haul, but since its still being made at a fair price it is so much better just to replace. The clock will be problem free right away instead of months, last longer than a overhaul and its prelubricated.