This is a 7/8" swivel for the front swivel position; it is made to screw into a nut imbedded into the stock, just like the pre-64 model 70. The swivel is similar to the pre-64 parts, and these will fit the standard pre-64 barrel escutcheon. All swivels are in excellent to like-new condition.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE