Very informative original overhaul manual for the McCormick Deering 10-20 and 15-30 tractors. Book measures about 6 x 9 inches with 136 pages. In good shape with general age wear and soiling and a bit of paper loss on the first pages but nothing that takes away from usability.  The centerfold is present but loose from the staples.  It is heavily illustrated with detailed pictures of service operations and also maintenance for these tractors.  Nearly all aspects appear to be covered in great detail!  This would be an indespensible book if you are restoring one of these tractors!  It would be a fine addition to your early IHC literature collection or display.  These original overhaul manuals are getting harder to find with each passing year.  The pictures tell the story.  You'll like it.  I can be reached at 262 573 193 1 if you'd like to talk about it.  Good Luck.