Pan American Pan American, E flat tuba, 3 pistons, ca. 1927 Pan American, EE flat tuba, 3 piston, c.1935 Pan American, EE flat sousaphone, 3 piston, c.1938 Pan American, E flat alto horn, 3 piston, c.1939 Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading...