The book is in its original, slightly dented slipcase; there's no dustjacket, as originally published. The plates are slipped in as in an old fashioned photograph album, black card with slits for each corner. There is a pocket in the back paste down with a red flexi square; the original instruction booklet and a magazine article about colour. Attached too is a small paint brush. I love the book plate on the front paste down which says: Steale not this book for fear of shame/For here you see ye owner hys name/And when you dye ye Lord will saye/Where is that boke you stole away?/ Then if you saye, you cannot telle,/ Ye Lord will saye, then go to helle. "The Ishihara test is a color perception test for red-green color deficiencies, the first in a class of successful color vision tests called pseudo-isochromatic plates ("PIP"). It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917. The test consists of a number of Ishihara plates, each of which depicts a solid circle of colored dots appearing randomized in color and size. Within the pattern are dots which form a number or shape clearly visible to those with normal color vision, and invisible, or difficult to see, to those with a red-green color vision defect. Other plates are intentionally designed to reveal numbers only to those with a red-green color vision deficiency, and be invisible to those with normal red-green color vision. The full test consists of 38 plates, but the existence of a severe deficiency is usually apparent after only a few plates. There are also Ishihara tests consisting of 10, 14 or 24 test plates, and plates in some versions ask the viewer to trace a line rather than read a number" (Wikipedia)