Thanks for the pictures. The Utica 219 with the steel trigger guard could be prewar. My local gun smith said the early 219/220 actions were "Rust" blued. When these actions are reblued in a hot bluing solution, they turn red/purple, depending on how long they are in the solution. Savage was constantly make internal changes to the actions. The First and Second Model Utica's and the 219/220A's were striker fired. and the action cocked when the top lever was pushed to the right to open the action. When the 219/220B's were introduced, the striker was replaced with a normal internal hammer. These barrels have a stud on the side of the barrel lug that engages a "cocking stud" inside the lower right of the frame that cocks the hammer as the barrel is opened. Changes continued through out production of the B, C, and D models. Starting with the "B"models, all actions were color case hardened, with very few exceptions.
Looking at your pictures and the "979" number on the 219 barrel, frame, and forearm, leads me to believe your gun was possibly a "Utility" gun originally with a shotgun barrel and matching forearm. By this, I mean it had both a rifle and a shotgun barrel with 2 forearms. These were produced in limited numbers.
I hope this information helps some.