The McClures store is on an old postcard (Harrington Postcard). In 1914, Harry Harrington sent the postcard to his father, A.J. Harrington in Pawnee City, Nebraska.
The awning-like signs hanging on the front of the building on the left and right say, "McCLURES" and have a portion of the text that goes along with the center awning text. This was a mystery figuring out the letters until Jillian M. Steenblock pointed out that it very clearly says, "WE SELL EVERYTHING." Thanks Jillian for making it look so much clearer now.