I found this part in our LEGO collection, and I'm really curious what it might be, it looks old and says "Pat. pend" on the back. Do you know? Thanks!
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1 Answer
It's a tie plate from the original 4.5V train system, specifically from a "switch point right":
http://www.bricklink.com/v2/catalog/catalogitem.page?P=x879cx1#T=C
