That indeed is a #1 1/2 Rolling Block Sporting Rifle. As for values, the #2 is very desireable, but in a centerfire caliber like your .32-20, the #1 1/2 is even more desireable! A 1 1/2 in .32-20, with a good bore and the condition of your gun will usually run around $1500. Your tang sight is not original to the gun, as the original would have two base mounting holes spaced 1.90" apart. Most likely someone could not find the right sight, so they trimmed the back part off, which is much better than drilling a new hole to match the sight! Your #1 1/2 is a post 1898, as it uses the late style forearm without the steel tip.-Vall
Below are the various Rem. Sporters from top to bottom, #1, 1 1/2, 2, 3, and 4.
