FIG. 1 is a perspective view of a convertible automobile cover showing my new design, taken from the rear and to the right thereof, shown on an example convertible automobile;

FIG. 2 is a left side elevational view, thereof, the right side elevational view thereof being a mirror image;

FIG. 3 is a rear elevational view, thereof;

FIG. 4 is a front elevational view, thereof;

FIG. 5 is another front elevational view, thereof;

FIG. 6 is an enlarged top plan view, thereof; and,

FIG. 7 is an enlarged bottom plan view, thereof.

The broken line showing the environment in FIGS. 1, 2, 3 and 4, is for illustrative purposes only and forms no part of the claimed design.

The straps of the cover are shown in their position of use in FIGS. 1, 2, 4 and 5.