This postcard started life as one that would have been used for the Imperial Period’s (Kaiser Zeit) Air Mail. Mention of that fact has been blacked out. Instead, it was mailed as a postcard regarding German technical or engineering prowess. It has been stamped with the date, 12 April 1938. A swastika appears on the stamp. The date stamp is repeated at the top over a postage stamp that depicts von Hindenburg in profile. A message is on the reverse.