The number on the wrist is the US serial plus US property mark.
Looks as if the marks on the right side of the butt are the factory Quebec roundel; 3 star model status; the serial number, 48AO, made 1908. This rifle was likely not a *** when made but was upgraded to that model. If you look at the bottom of the barrel underneath the rear sight, you will likely find evidence of a different pattern of rear sight having been fitted previously. On 10-08 (Aug, 1908) it went to the 1 ?RCD? Not sure if these are the letters. RCD, Royal Canadian Dragoons? Just a guess. In March, 1914, 24th Bn, rifle #89. Can't make out the letters overstamped by the numeral 24.
I am sure that there are others here who are more knowledgable than I am.
Many of the US surcharged II*** Rosses were sold off through the NRA in the 20s. Yours looks to be a very presentable specimen, in better shape than many.