Could also be a rifle sent over to the UK in WWII, stock has been sanded, so hard to say now, without black light. Looks absolutely filthy, so I would give the metal the Easy Off treatment, as I've posted about elsewhere. It will look completely different after that. 1917 rifles were sent over to France for sniper use according to one account I read. You can see this one has the Birch stock introduced when walnut supplies dried up. The Birch was just as a good if not better and 40% of the walnut blanks Ross was supplied from the US were too low in quality for stocks anyway, according to The Ross Rifle Story.