PC: Article identification

["Robert L. Harris" <rlhjr@xxxxxxxxxxxxx>]

At an August railroad show I bought a  2" X 4" oval aluminum plate about
3/16 " thick. It has two mounting holes cast/drilled. Cast on it at the
top part of the oval is PENNCENTRAL and in a rectangle at the bottom is
stamped the number AT 1703.

Can anyone tell me what this was used for? Seller said it came of
freight cars.

Thanks
                                rlh
--
Robert L. Harris
rlhjr -AT- bellsouth.net