I'm not sure that Savage used their own wood for the first rifles they produced.
Someone with more knowledge on this, such as Woodchopper or Louthepou could verify or correct this, or even someone with more knowledge on it than I have.
I've seen more than a few new in grease, unissued, Savage No4 rifles, both early and later manufacture, wearing Longbranch marked wood, along with Longbranch marked metal components, such as cocking pieces, bands and trigger guards.
I've always been under the impression that the first Savage No4 rifles were actually assembled with a mix of US and Canadian made parts, until Savage started to get everything together on their end.
Even then, my aunt used to work in the Longbranch factory during WWII and she told me she really hated it when Savage marked stocks came into the factory to be installed on Longbranch rifles, because they were heavier and she couldn't carry as many to the ladies on the line that assembled the rifles.
I believe, it was common practice for both Canadian suppliers and US suppliers of the components to ship to whomever needed them most at any particular time to keep production numbers up to the expected standard.
IMHO, it's quite possible your rifle (nice score) was originally fitted with Canadian wood.
Again, if anyone knows what they're talking about on this, please correct me if I'm wrong.