This 1955-1962 Chevy Corvette RIGHT Rear Drum Brake Backing Plate is an original GM part that has been media blasted and primed. The way to distinguish left from right is the hole where the emergency brake cable enters. The hole should point toward the front of the vehicle. Some backing plates may have some pitting. Another distinguishing factor is that the rim of the plate is slightly lower than the inner pads of the backing plate.