FIG. 1 is a rear perspective view of an outer shell showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a side elevation view thereof taken from the left of FIG. 2, the opposite side view being a mirror image thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a rear perspective view of an outer shell in accordance with a another embodiment of the present design;
FIG. 8 is a front elevation view thereof;
FIG. 9 is a side elevation view thereof taken from the left of FIG. 8, the opposite side view being a mirror image thereof;
FIG. 10 is a rear elevation view thereof;
FIG. 11 is a top plan view thereof; and,
FIG. 12 is a bottom plan view thereof.
Where the portions in dashed lines are shown for illustrative purposes only and do not form part of the claimed design.