Re: I recovered this tag from the same old road bed as I found the other iron plate.
The style looks very similar to the larger plate you have so I'd bet they probably came from the same place.
Could be this one was mounted on one of those old fashion, long, triangular name plates that sat on peoples desks to let you know who you were talking to. (Fits the school idea) I remember those name plates on our principal's desk...back in the 60's.
Maybe you could change your search criteria to iron name plate mfgr.'s of maybe the early 1930's or so....in the K.C. area.
Could be someone took those as mementos from where ever they worked when they moved.
Al