old CARNEGIE STEEL employee ID badge

Nowadays we're all used to seeing people all over the place with ID badges of some sort, usually plastic cards hanging around their necks on lanyards or clipped to a shirt pocket or something. This one would seem to be rather a predecessor to the modern ones, sans card reader chips and holograms and barcodes and all the stuff now also ubiquitous to such things.

It is a several piece affair, a tin (non-magnetic anyway) backplate with rolled edge holding a green card (itself holding a small actual photograph) and a (now slightly shrunken) plastic domed cover, all fixed together with a metal grommet. The card is printed "CARNEGIE-ILLINOIS STEEL CORPORATION - SOUTH WORKS", the employee's name likely added to it with a typewriter along with a stamped badge number and the photograph of her, before the whole thing was first crimped together. It is 3" long and 2" wide. Sadly it is not dated in any way, so I don't know how old it is.

I don't really know any more than that, but I kinda think "CARNEGIE STEEL" is/was/etc UNITED STATES STEEL at some point in the evolution of that once giant corporate conglomeration...?