1969. Seventh Impression. 497 pages. Grey jacket over red cloth. Contains black and white diagrams throughout. Volume One. Book is in better condition than most examples of this age. Neat, clean, well bound pages with very minimal foxing, tanning and thumbing. Small inscriptions and neat labels may be present. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Unclipped jacket has light edge-wear with minor tears and chipping. Mild rubbing and marking.