Airship Photos
Definitely LZ127 Graf Zeppelin. The fifth engine gondola and the bumper skid on the lower vertical stabilizer are the clincher. The photos would have been taken prior to 1933, when swastikas were painted on the left side of the vertical stabilizers and the tricolor German flag were painted on the right.
I can't tell for sure, but is that a mooring tower in the background of the first photo? Do you know where the photos were taken, ancientaviator?