Original Winchester buttplate screw (sold individually).
Excellent condition screws are used with minimal tool marks.
Very Good condition screws are used with perfect threads, but may have very minor tool marks and/or bluing wear, but no rust or other damage.
Reblued screws are original Winchester screws which have been polished and reblued to closely resemble a new original part.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE