Gelatin silver print on pressboard signed by Ludwig Knorr and Jakob Maier, c.1928. Rare aviation photograph depicting uniformed Dr. Hugo Eckener, famed Graf Zeppelin commander, beside LZ 127 rigid airship with "Graf Zeppelin" on hull—signed by crew associates rigger Ludwig Knorr and Jakob Maier (Eckener's is in the print), capturing the transatlantic Zeppelin era. 16 inches wide by 11 inches tall by ¾ inches deep, period frame.