The handwritten note on the information leaflet points to the seller of the aviator chronograph: The company Friebe from Heidelberg, which supplies since 1951 aviation needs and then and now also watches for pilots.
Further information: Junghans and its aviation wrist chronographs
and here: The most beautiful: Junghans J88
and the version without shock protection: Junghans J88; Junghans 688.00
and on the great website of Dirk Fassbender: www.dirkfassbender.de/j88
Here the back of the type 111 with engraving of the Bundeswehr supply.