The ornamental design for lower case, as shown and described.
FIG. 1 is a front, top, right axonometric view of a lower case showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is an exemplary diagram of the lower case usage wherein the broken lines are shown for illustrative purposes only and form no part of the claimed design;
FIG. 9 is another exemplary diagram of the lower case usage wherein the broken lines are shown for illustrative purposes only and form no part of the claimed design; and,
FIG. 10 is another exemplary diagram of the lower case usage wherein the broken lines are shown for illustrative purposes only and form no part of the claimed design.
The broken lines depict portions of a lower case and form no part of the claimed design.