Zeppelin-Weltfahrten, with frontispiece of Ferdinand Graf von Zeppelin, with foreword and history of balloon and airship construction, and containing 265 miniature photogrphs with descriptions and details of early airship and Zeppelin construction, First World War operations including the 'Afrikafahrt' of L59 in 1917, post-war Zeppelin flights of LZ 127 "Graf Zeppelin", with diagrams, coloured charts and tables and embossed reproduction of the "Weltflug" medallion; Zeppelin-Weltfahrten, Book II, with foreward and gilt embossed plaque to the memory of the crews of airships and Zeppelins lost during the First World War, and containing 155 miniature photographs with descriptions and details of Zeppelin flights including those to the Arctic (1931), Spitzbergen (1930), Holland (1929, the Balkens, Orient (1929) and others, with one colour plate, map of routes, diagrams and tables.