I question the provenance of a Husqvarna rolling block in America.
They were adopted for military service in Norway & Sweden in 1867, and were always rimfire in military service. Eventually, when militery deliveries were up to date, Husqvarna made the roller available to civilian sales in 1877. Initial chamberings were rimfire, with centre fire available from 1886 to 1900, depending on model. Husqvarna rollers were made up to 1912.
http://www.skydevaaben.com/allhvamodels/info.xmlEven if they were available for civilian sales, how did it get to America? If it were a Remington, this would be more believable. If this piece was given to a Crow chief, no matter how sophisticated, I find it hard to see how it it appears in such fine condition. I'd need to see the provenance, rather than cribbing a wikkipedia article.