This is a set of 15 first editions from 1974 to 1975. There is yellowing, staining, and soiling due to aging. There is some staining on the three sides of the book. Volume 10 has a folded corner (photo 14). Overall, the condition is good, with no writing, and there are no problems with reading. The monthly supplements are included except for volumes 9 and 15. Please consider this as a used book. Original publication price: 2,000 yen per volume.