This is a type-II bolt housing for magnum caliber rifles. The bolt grades at NRA very good condition with some bluing wear of the handle and metal wear typical of normal use throughout.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE
NOTE: While model 70 bolts may appear to be interchangeable, to safely replace the bolt in a rifle requires the action to be checked for proper headspacing and lug seating. This is a simple procedure which can be performed in a matter of minutes by a qualified gunsmith.