Rando Historic Documents- Truxton Circle Postal Station

Not really sure what to do with this. I was actually looking for other documents and discovered this in a odd folder.

Official Postal Guide July 1939 cover
From Official Postal Guide, 1939

Why did I collect this info? dunno. Where did it come from? Probably the National Archives, whatever the RG is for postal records. So if that is the right cover, the term Truxton Circle associated with a place goes back a while. Not sure what the importance of a postal station is.