Monatshefte für Luftschiffwesen (German Monthly Airship Journal), 6 vols 5 for 1931, 1 for 1932

Monatshefte für Luftschiffwesen (Monthly Airship Journal), 6 volumes 5 for 1931, and one for 1932 bound in one folder. 

They are bound in the following order: Heft 1, 1931; Heft 3, 1931, Heft 7/8, 1932; Heft 5, 1931; Heft 4, 1931; Heft 2, 1931. 

Journals are: 30 x 21 cm

The folder is marked and has damage. The journals have marks, folding and creasing. Please see photos.