Here’s a card of Kwame Nkrumah Avenue in Accra.  It has a Ghana stamp and is postmarked Accra.  It is also postmarked Lagos.  It is addressed to someone in Kentucky U.S.A.  There is a message saying it was missent to Nigeria.  This card travelled a roundabout was to its U.S recipient.  Presumably it got there sometime in late summer or autumn 1965.