This is an ORIGINAL 1970's Dresser Industries Whispair Blowers sales brochure.  These were built in Franklin Park, IL. back in the 70's.  This has super illustrations as well as very detailed information about these blowers.  The cover is in perfect shape with NO tears or tatters.  This contains 10 perfect pages (see pics).  This catalog is in MINT overall condition. Very rare piece!  FREE S & H. Thanks for viewing.............Triple K