Handbook of Service Instructions for the Model R-2600-11 Engine and Associated Models (R-2600-3, -11, -19, -23 and -25) manufactured by Wright Aeronautical Corp, Paterson, New Jersey.  Technical Order No 02-35HA-2, February 25, 1942, revised 07/10/42.

Ring bound style with card covers to front and rear, not page numbered but assume to be at least 300, probably more.  Profusely illustrated with several fold out pages of detailed diagrams.

Stock Code 804623/17