So I recently acquired a Winchester Model 67. It's got a 27" barrel, chrome bolt, groove and post sights (regular .22 or airgun iron sighs, no peep or aperture). The rifling looks somewhat worn but bright and shiny, and the crown looks pretty decent. There's some rust on the outside of the barrel, especially around the rear sight. There is no serial marked. It's chambered for .22 short, long and long rifle. I can't put up a pic tonight, but I can get one tomorrow. Anyone know anything about it? What's it potentially worth? Should I clean off the rust and leave the original finish that is left, or would it be ok to have it re-blued?