Postally used 54th Massachusetts Infantry Regimental Cover sent to Captain Luis Emilio, and docketed on the back by Emilio himself.
The 54th became immortalized in the movie "Glory", which is a must see film for any one who has a serious interest in the civil war.
The cover has a minor chip in the upper left corner (as you look), otherwise in very good condition.
Emilio was the author of "A Brave Black Regiment: The History of the Fifty-fourth Regiment of Massachusetts Volunteer Infantry, 1863-1865"
$599.99 plus shipping