Model 1873 from 1885 as documented from the Cody museum. The other is also from around 1885 as best I can calculate, but no documentation. 44 DA top break.
I’ve got Great-Grandfather’s SAA Colt in .44-40, shown here with him and his mustache. Never fired it because I believe it is before smokeless powder and would hate to blow it up.
Before they committed corporate suicide, I had US Firearms make a copy of Great Grandfather’s revolver, right down to the same serial number. My copy shoots .44 Specials, though.
US firearm law goes by when the receiver was made, so your M41b is older.
US law also means that a Turkish 1893 that was refurbished in the 1930s and so stamped is actually classed as a pre-1898 antique, and legally is not a firearm.