Un-used/mailed Union patriotic illustrated envelope. with no stamp or addressed
Unknown printer/author
Unknown printer/author<br><a rel="nofollow" class="external text" href="http://arago.si.edu/index.asp?con=1&amp;cmd=1&amp;mode=1&amp;tid=2027691">Smithsonian National Postal Museum</a> <br>US Post Office<br>Photo image obtained/rendered by   <a href="//commons.wikimedia.org/wiki/User:Gwillhickers" title="User:Gwillhickers"><i>Gwillhickers</i></a>.