German WWII Reichsbahn 40 Year Railway Worker Document Grouping

Original period manufacture. Lot of six large format award and congratulatory documents pertaining to the career of Reichsbahnamtmann Ludwig Lange of Munster. Born in 1899, he apparently was a life-long employee of the German Railway, earning his 25 year Faithful Service Medal in 1938 and his 40 year medal and KvK 2nd Class in September 1941. Documents for all three medals are included. November 1939 congratulatory letter from the Reichsverkehrtsminister with Heil Hitler greeting, 1939 letter from the Reichsbund der Deutschen Beamten hand signed by Kreissachschaftsleiter, two presentation folios with hand done artwork on the pages. I wonder if he was called back in as the war went on.