Ran both SM 13x40, and Colchester 13x40 machines at work. Buy the one that is in the better shape! And better outfitted with chucks and other goodies.
The SM's were a bit lighter built than the Colchester, on a size for size comparison, but most guys would never be pushing the machines hard enough to tell.
SM's are no longer a Canadian product. The buyers of the Company moved it stateside some years back, and now outsource their castings from the Far East, doing only just as much of the manufacturing in the States, to meet the letter of the Laws as far as foreign sourced products being supplied to the US Military.