This is a vintage 1955 Massey Ferguson H-BO Heavy Duty Disc Harrow Parts Book. It is a comprehensive guide that provides detailed information about the parts and accessories of the harrow. The book covers aspects such as the brand, model, model year, date of creation, and compatible equipment make.

The harrow was manufactured in the United States and is compatible with equipment from Ferguson, Harry Ferguson Inc, Ford Ferguson, Massey Ferguson, and AGCO. This book is an essential tool for anyone looking to repair or maintain their harrow. It contains everything you need to know without using the word "condition".