1936. No edition remarks. 242 pages. No dust jacket. This is an ex-Library book. Yellow cloth covered boards. Black and white photographs and diagrams. Ex library copy with associated labels, inserts, stamps and annotations. In German. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have light shelf wear with minor corner bumping and crushing to spine ends. All surfaces tanned and sunned, particularly spine. Gilt lettering to spine is slightly dulled. Boards are slightly bowed.