First edition, though it is not a first printing, which is indicated by the lack of cover price on the inside of the dust jacket, and the absence of the word "pendula" on page 9. Dj is in 2 separate pieces, with a long tear from the spine to the front cover, as pictured. About 2.5 inches of loss to the dj at the top of the spine. Boards are in lovely shape. 186 pp.