It is probably an Iver Johnson Special Trap. If it is original it has a
32" barrel, and I've never seen one with a case-colored action. I have two of them, and have seen others. All still had original finishes, and had matte blued actions.
This is a good, original example of the gun, if badly overpriced, with what is generally believed to be the proper forend. Note that it is not the commonly found schnabel, which is likely a replacement. The era catalogs all pictured the gun as having the fuller trap style forend.
https://stevebarnettfineguns.com/iver-jo...ingle-barrel-12 SRH