City Mail Delivery - 1863-1963 - 5-cent 1963 issue U.S. stamp. <a href="https://en.wikipedia.org/wiki/Norman_Rockwell" class="extiw" title="en:Norman Rockwell">Norman Rockwell's</a> design is a whimsical and nostalgic drawing of a Civil War-era letter carrier.
Bureau of Engraving and Printing. Designed by Norman Rockwell.
U.S. Postal Service; National Postal Museum: <a rel="nofollow" class="external text" href="http://arago.si.edu/category_2034130.html">City Mail Delivery Issue</a>