Edwardian, thanks for that information. It seems like Amoskeag was primarily involved in the manufacture of muskets or rifles. Are you aware of any double guns coming out of that outfit?

Here are some more pictures of the Lindner that may or may not aid in identification.

http://s304.photobucket.com/user/djangofandango/library/Lindner?sort=3&page=1

In any event, if I am correct that the original barrels are lost, I would think identification may prove exceedingly difficult?