8vo - 20.5 x 13 cm.; 184 pp. Half bound with brown cloth on the boards and tan leather spine and corners. Gilt lettering centred on the front board. Thumb indexed on the fore edge of the text block. The first edition of such a manual. The externals show only mild wear (scuffed corners with light bumping) with the exception of the spine crown which is chipped. Old price blacked out on the front free end paper and a date stamp (June 3, 1971) on the back paste end paper. The end papers are browned Otherwise the interior is clean, the binding is tight. A clear and removable archival cover has been fitted.