The ornamental design for the elliptical air horn bell, as shown and described.
FIG. 1 is a top perspective view of an elliptical air horn bell showing our
new design mounted to an air horn with the broken line showing for
illustrative purposes only and forming no part of the claimed design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a side elevation view of one side thereof, the other side being a
mirror-image of the one side; and,
FIG. 5 is a top plan view of one side thereof, the other side being a
mirror-image of the one side.