This is a vintage 1st Edition Lycoming R-680 Aviation Engine Manual in good vintage condition. The book is a 1st Edition printing copyright 1930. The Book does display wear consistent with age (see photos), but is still intact and is not missing any pages or information. The book contains all the information nesscary, including fold out diagrams of parts, to service, inspect, and maintain a lycoming R-680 aviation engine. The books outer cover displays wear snd discoloration, but is still intact and overall good vintage condition. Please see photos for full description.