This is 'The Complete Swiss Material Guide Book' of BESTFIT Genuine Swiss Watch Material, Catalog #101, dated 1952. It shows the watch movements identification, material sorted by manufacturer and caliber with front and back views, and illustrations of each part with part number and name chart. It measures 7 1/4 by 10 inches. It has 320 pages. The covers have some age yellowing and there are no tears. There is some twist in the spine so it lays slightly crooked but the binding is strong and intact. The front cover is tearing away from the pages on the inside (seen in the pictures provided) and does not show at all on the outside. The first pages are secure in their binding and not falling out. Overall this great reference book is in very good to excellent condition. This is a 'must have' classic for any watch lover!