You have a purpose-built .22 military training rifle. I know, I used to have one exactly like it many years ago and now kick my butt for letting it go. It has the volley sights intact as well as the windage adjustable rear sight which would have been set up for .22 shooting. The rear sight IS correct, as training at that time was for the old SMLE and they had that rear sight configuration, not peep sights. Lucky you! I sold mine years ago for $800, so yours is worth all of that. Hereabouts, I don't think $1000. would be unreasonable.