1950. No edition remarks. 568 pages. No dust jacket. Blue cloth covered boards with gilt. Black and white diagrams throughout. Black and white fold-out map at rear. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Previous owner's name to front pastedown. Boards have light shelf wear with minor corner bumping and crushing to spine ends. All surfaces heavily tanned, particularly spine. Some additional mild marks and staining. Gilt lettering to spine is dulled but remains brighter on front.