Nice original example of the Sudetenland medal here, officially known as the "1 Oktober 1938 Commemorative Medal." This medal comes complete with  original award paperwork, and was awarded to Franz Dusi, a Luftwaffe serviceman (designated as "Flieger") on June 25th, 1940. Document is partially torn and will be shipped flat in a plastic document holder. 
 
Instituted on 18 October 1938, the Sudetenland medal was awarded to participants in the occupations of Sudetenland in October 1938 and Czechoslovakia in March 1939.