Soldbuch grouping - Jagdgeschwader 108 - Müller

Soldbuch grouping of 'Oberfähnrich' Günther Müller who served within several different units and who ended up within Jagdgeschwader 108.1) Soldbuch of Müller who seems to have been promoted to 'Leutnant' but then again was demoted?!?Müller was awarded the 'Segelfliegerabzeichen' and 'Flugzeugführerabzeichen'.2) 'Flugbuch' Nr.1!!! (flight record book)3) 'Flugzeugführerschein'Comes with its original protective cover.