1969. No edition remarks. 117 pages. Pictorial dust jacket over pictorial paper covered boards. Black and white photographs and diagrams. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have mild shelf wear with light rubbing and corner bumping. Some mild marking and tanning. Book has slight forward lean. Unclipped jacket has light edge wear with minor tears, chipping and creasing. Some rubbing and marking to surfaces.