The rating plate should be on the motor hood, behind the handle / box. They used to be on the box in the early days, opposite to where they are on the motor hood. I don't know why it got moved but you'll see the outline. You stand little chance of getting a new furniture guard and old ones are usually worn. But unlike the 504 which was tan, the 502 was dark brown, almost black, and much easier to replace as you can modify one from a Hoover Junior.