【VIGOR】 12 pages There is some staining on the back cover. 【ACCORD】 12 pages There is some staining on the front and back covers. 【QUINT】 Folded 4 times, 8 pages There is some yellowing. 【Ballade】 Folded 4 times, 8 pages There is some yellowing. All four books have no other noticeable tears or folds besides the above. The exact date of publication is unknown as it is not stated, but it is believed to have been published around 1980. Thank you.