Hello Tom,
Now I have not doubt that this Hillmann was the one in Spain. A noteworthy thing are the dates in the document. Promoted 1 July 1937 and the date of issue of the document, 29 March 1938 !! 8 moths later !
He had to return from his tour of duty in Spain to get the document officially from his unit.
Any clue of the fate of his man in WWII?
Regards
Fran