Variously known as the “Griffin” or the “American” depending on which advertisements are researched, the heavy model shown here was also of 1898 vintage. It differed primarily from the smaller model in its double-acting arrangement whereby the piston did double duty. A stuffing box on the front end of the cylinder was used, along with a crosshead, much like steam engine practice. A hot tube or electric ignition was available. The single-acting engine was available in six sizes from 1 1/2 to 11 1/4 horsepower, and the double-acting model was built in six sizes ranging from 4 to 18 1/2 horsepower.