Paul--
Have you seen others with similar treatment? I've only seen photos of two other post-annexation guns, and they had typical one-piece stocks. Still, this gun has different features than any other pre-war gun I've seen, such as the hooked pistol grip, tang safety and shadow-line cheekpiece. Maybe it's a really late pre-war, with atypical styling and (odd as it seems) two-piece stock? If you have some historical insight into this, or have seen another rifle with similar construction, please share!
Best,
Malcolm