Large calibre case maker's mark M.A.C. (Possibly Canadian)


#1

I have a few WW1 era artillery cases with the marker’s mark “M.A.C.” and Canadian property marks (/|\ inside C).

Does anyone know who used this maker’s mark?

Canadian collectors, can you help me here?

Thanks in advance for any info.


#2

M.A.C. is the Montreal Ammunition Company, Montreal.

Regards
TonyE