1926. No edition remarks. 180 pages. No dust jacket. Blue cloth covered boards with gilt. Black and white diagrams throughout. Pages remain bright and clean with minimal tanning and foxing. Some cracking to gutters with exposed netting. Binding loose. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned and sunned, particularly spine. Gilt lettering to spine is dulled but remains brighter on front. Book has slight forward lean.