Booklet has 53 pages and 157 pictures of information on different aspects of combining in 1968. The information in photos  ST-1 Thru ST-8 is interesting. This was a following along booklet from an instructor lead service school at the Columbus Branch in 1968. Since  many of these combine are not in service, makes this vintage publication a nice collectors item. Seller's note: Booklet has been in storage for several years and is from a John Deere dealership.