This is a standard steel trigger guard from a Winchester Model 70 rifle.
Bluing - 90% - The finish on this piece has almost no edgewear or fading, and only a few light scratches.
Metal - The metal has some areas of light rust and pitting, primarily on the inside of the bow, and one or two tiny tool marks.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE