" I do not know how long this was used."
It changed in 1927 when Savage went to the raised ramp front sight style. The 99-A,B,C,D and H had front sights that were dovetailed in the barrel . After the switch in 1927 only the 99-H stayed the same while all the others went to the ramped style.
" I don't know the exact date of the barrel but if the rear sight is original it has a 1914 patent date."
Given that it is a .250 brl, I would guess it was from around 1914 to mid-1919.
Last edited by Rick99; 07/29/20.