When I first spied this card, I thought it was maybe 50s.  Then I saw the old City Hall/Public Library on the left and revised my estimate of the printing date.  Later, I scored this specific card, which is dated, sort of.
“Holston Heights”?  We always called it “Cement Hill”.
This is an E.C. Kropp card, printed in Milwaukee. Plate #4844-N.  333 miles is about right for Washington, D.C. (and a million other places).