Front Brake Backing Plate.  This fits the larger brakes used on the 30-31 AA truck.  This Is complete and is in good shape.  The Adjuster and actuator wedge move as they should.  The plate itself has some pitting.  Includes the mounting bolts, grease ring and operating pin.  The pictures tell the story. 

Feel free to ask questions and be sure to check out my other listings.