Germany Hanover. Two covers. 1. Mi 2a on a cover sent from Artlenburg (today Lower Saxony) 12.4.185? to Luene (Lower Saxony) 2. Mi 14dI + 15b on a cover (with contents), sent from Harburg 14.6.1861 to Köln. Harburg was, until 1937, a part of Hannover. After that Harburg was incorporated in Greater Hamburg.