This is a magnum bolt housing made in 1960. The bolt was originally delivered on a .264 Win Magnum rifle.
It grades at NRA very good condition. The bolt shows some light stains on the shaft and some light wear marks. Handle bluing and bolt face are both excellent (extractor ring not included).
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.