This is a type-III bolt housing for magnum caliber rifles. The serial number indicates 1960 production. The bolt grades at NRA very good condition with some bluing wear of the handle, as well as some very light freckling and minor wear on the shaft.
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.