This copy is evidently a reprint from the original from 1499. Colophon given as "Impressum Bononiae a Benedicto Hectoris dili | genter & eme[n]date Anno Salutis Millesimo unde- | quinge[n]tesimo. Idibus Aprilis. Illus. Io. Bentiuo. ii. | Reip. Bononiensis habenas feliciter moderante. | Regestum huius operis. A.iiii. B.iiii. C.iiii. D.ii.", or the date as 13 Apr. 1499. The book is bound with other books printed by Benedictus Hectoris in the 16th century, with several reprints. The title page of the first book, printed in 1521 gives the titles of all the other books bound with it - therefore it is conceivable that the reprints were made to accompany the first, and printed in or around 1521.
Collation: A⁸-C⁸ D⁴.