I agree with the above. I stripped a Norwegian capture and applied modern (Sunnyside) raw linseed oil. A lot of it. It only looks pumpkin pie colored, red highlights from the glue, some yellow white in the grain also.
This darkened stock has been presented before, something else was going on with it in order to turn it that color. It would be nice to get to the bottom of it. To the OP, proceed with caution, use a test area, but only if it is a shooter grade rifle. The end product for my Norwegian is not different from what I see in the reference section.