There was a significant gunsmith business in lining Smiths; and usually in 45/70. This is just one barrel



The gun DOM is 1898 and the "Bernard Ribbon" or "Rubans Royal" barrels would be original. That is also an interesting variant found usually on Gr. 1 guns from 1892-1897. Not common to have the grade; '1E', marked on the "barrel loop reinforcing wedge" as yours is.

The Crown Steel barrels would have been added later, likely at the Hunter Arms factory with the fitted FE for 1/2 the price of a Gr. 1, and marked with the same SN. Note the '2'. The ivory FE insert is unlikely to be factory.

The buttplate is aftermarket and found on c. 1900's LC Smith, Ithaca, AH Fox, and Lefever guns. The maker is unknown.

It looks like the extractor screw in the Crown lug is missing?

Very cool. Please let us know if your shoot the 45/70 barrels. The 120 year old gun should of course by evaluated by a double gun specialist before use. You are not far from one of the best, and Buck Hamlin would get a kick out of seeing your gun -
Pevely, MO
636-479-4304