Modular Display Case

FIG. 1 shows a perspective view of a modular display case that embodies the ornamental design;

FIG. 2 shows a back perspective view thereof;

FIG. 3 shows a top plan view thereof, the bottom plan, right elevation, and left elevation views being identical to the top plan of FIG. 3 ;

FIG. 4 shows a front elevation view thereof; and,

FIG. 5 shows a back elevation view thereof.