Reading T-1 Front logo plate

I have one of those front plate logo's from the T-1's. It's legit, that old cast junk material. It's the black diamond with the old faded gold lettering "Reading Lines". You can see it on the front of the 2124 at Scranton Steamtown USA. Just wondering how rare of an item that is? If anyone has seen one before and if they have any value? I got it from my late grandfather who was a RR cop on the Reading way back in the day.

Thanks in advance for any info on it.