This is a Luftwaffe (heer) Wehrpass with several very interesting entries.
On name of Paul Lange from Weimar, who was a Flugzeugfuhrer in the first World War.
Complete with passphoto, and many interesting “Eintragungen” like Gewehr 98.
The owner was a WWI and WW2 participant and was awarded with the Iron Cross second class (EK2), Sachsen Weimar Medaille, Tirol Medaille and Ehrenkreuz. The Sachsen Weimar Medaille is very rare to enounter in a Wehrpass, as is the Tirolean WWI commemorative medal. With the Ehrenkreuz is most probably meant the Frontkämpfer Ehrenkreuz.
The Wehrpass itself is a first type pass with small eagle on the front.