Sheets 5-11, 13-17 & 19-30 (series 1); Edited by the Norwegian Society of Nitrogen (Norsk Hydro) and the Norwegian Lithographic Office, Oslo; text in German, English, French, and Norwegian; vertical and horizontal format, approx. 84 x 64 cm.
Not framed, with some minor edge creases and also some small tears, occasionally slightly yellowed.