1966. No edition remarks. 624 pages. Pictorial dust jacket over red cloth. Black and white diagrams throughout. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Minor pencil inscriptions to front free endpaper. Tape marks to endpapers. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Unclipped jacket has light edge wear with minor tears, chipping and creasing. Some rubbing and marking to surfaces. Spine noticeably sunned. Some tape marks to flaps.