I have a nickle model 1905 3rd chg. numbered 154720. Lettered by Roy Jinks to have been manufactured 18 July 1910 and was shipped to a gun distributor in Philadelphia.
I enjoy shooting mine; very smooth trigger. On the seven yard range I can shoot decent groups as long as I see a lot of the front sight. The old timer doesn't fare so well against the model 14 or other 6" K frames on the 15 yard range.
I hope you enjoy your new, but old piece.