All 4 pieces show overall normal signs of use. They belonged to a Oberfeldwebel Eugen Herrmann who served within the Stab.II Abteilung Flug-Funk Versuchsregiment (mot). A Luftwaffe related unit that is not so common. The grouping consist out;
Promotion document from Unteroffizier to Feldwebel. Dated 5.September 1941.
Promotion document from Feldwebel to Oberfeldwebel. Dated 31.August 1943
Wehrmacht-Fuhrerschein (driver's license) with portrait of Eugen. Now serving in the Stab IV Luftnachrichten Versuchs Regiment (mot.). Eugen was also licensed to operate a Halbkettenfahrzeug up to 10tons.