This 1938 vintage ad for Hercules diesel engines has a nice black and white drawing of a diesel engine and the headline, “A New Triumph of Diesel Engineering”.
Year Published: 1938
Approximate overall size – inches: 10.5 x 13.5
“Hercules now brings Diesel economy to new and much broader fields. The latest addition to its line of heavy-duty engines—a series of small, four-cylinder, high-speed Diesels—is built in three models, developing 56.5 h.p., 62 h.p. and 70 h.p., respectively.”
This is a 82 yr. old original vintage ad removed from a 1938 publication and is not a reproduction of any kind.