This is the “Aircraft Engine & Accesory Development Corp.” in Pennsylvania.

-In 1932 they presented two engines with horizontally opposed cylinders. The 8-cylinder and 12-cylinder were named Gryphon M and Gryphon N respectively.

-The Gryphon M with 8 cylinders gave 150 hp at 2000 rpm and was air-cooled.

-The Gryphon N with 12 cylinders gave 225 hp at 2200 rpm and was liquid-cooled.