This is a standard steel floor plate from a Winchester Model 70 rifle. 
Bluing - 70% - This floor plate has factory bluing. The finish is significantly worn around the edges, and is faded and scratched throughout.  A few of the scratches read through the bluing and into the metal.  The finish on the hinge tab remains in excellent condition.          
Metal - The metal is in good condition with a few significant scratches.  
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE