Happy to share this setup with you.
Blender File :
https://www.dropbox.com/s/38zpuzmmb04czcf/021_AM_PlateFrequency.blend?dl=0
NO SIMULATION, procedural animation.
Voronoi driven fracture watch case. Point cloud rendered to keep the dust look at the creation stage.
You can also use the Growth Setup strategy to built the watch case as mesh or it if you like.
The watch case object is not provided in the Blend File.