A couple of thoughts from those pictures:
1) Looks like the s/n has been removed. Is that going to be a problem in Canada? It is a big problem in the US.
2) On the right, does it have US Property stamps on the dust cover forward of the trigger? I can't tell if it's a commercial model or military (the s/n would tell that if it were there). The "H" on the slide above the fp stop indicates a military slide at least. If you remove the slide stop the s/n may appear also on the slide beneath it surrounding the fp hole.
3) The thumb safety and slide stop are wrong, from a much later gun. All other parts look correct to 1913. Perhaps it was a military gun that had been through an arsenal at some point and then was later, er, "liberated" from service and the property marks and s/n removed, and then refinished. This is pretty common. The grips are later (WWII or later) GI style grips, but unable to tell if WWII era or later production.
4) For some cheap but authentic grips, I'd consider three options:
a) Herret's makes a nice looking walnut checker, no diamonds, and they sell via CDNN for like $20. Authentic to a 20's/30's era gun, but would also look good on that one.
b) Get some take-offs from a current production Colt WWI replica.
c) Any set of nice dark walnut double diamond grips would look correct. You can get these from ebay or from many, many vendors.
I'd say the gun's worth about $500 to someone looking for a rough old shooter for nostalgia or restoration. Keep in mind the steel in these is not hardened and after this much aging, lots of shooting can crack lugs or rails.