Steve:
Looks like there may be another letter after the CA? All the proofmarks are from the Liege facility and it was not very economical to make it elsewhere and then have it proofed in Liege. The mechanics embraced mechanization early on and there was virtually no one in the world that could compete with them on price. I would say the 952 is the serial number and not an assembly number, but the possibility exists.

Kind Regards,

Raimey
rse