Yes, it sure seems to have had a rough life. A few different collets, one crimped on, and a solid 3rd wheel. Someone took a wire wheel to it at one point as well. The hammer spring is quite nice though, almost looks like an elephant head.
I agree with brass plate longcase movements Nick, but the Dutch also made steel plate movements. I am sure I have seen one posted here before. But, I'm having trouble finding that thread. I'll post it when I do.