This is a type-III bolt housing for magnum caliber rifles.
Handle bluing - 90% - The handle bluing on this bolt shows minimal wear on the knob and edges of the piece.
Metal - This bolt is in excellent overall condition. There are no significant marks or nicks on the bolt shaft or face, but there is some minor pitting in several localized spots on the bolt 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.