We have this double gun that my father acquired long time ago. We wanted to know its value now, but we have no idea. I have all the info in the photos. If anyone can help, i would really appreciate it Ty.

I have a 12 gauge double barrel shotgun , it says on the side "norinco sl 12-spm" if you can find any information on it id appreciate it . I know it's a Chinese gun but that's really all I know !