This original 1931 Gray Marine Boat Engine catalog from Detroit is a must-have for any boat enthusiast or collector. It provides a fascinating glimpse into the history of marine engineering and the development of Graymarine's iconic engines.

With detailed information about the engines, including drawings, diagrams, and technical specifications, this catalog is a valuable resource for anyone interested in the history of marine engineering. It is an excellent addition to any collection of boat parts and accessories, and is sure to be a conversation starter. Don't miss your chance to own a piece of history with this Graymarine Boat Engine catalog.