The ornamental design for a four startrophydisplaycase, as shown and described.
FIG. 1 is a top perspective view of my new design for a four star trophy display case;
FIG. 2 is a bottom perspective view of my new invention;
FIG. 3 is a left side elevation view of my new invention, wherein a right side elevation view is identical;
FIG. 4 is a front and back elevation view of my new invention;
FIG. 5 is a top plan view of my new invention;
FIG. 6 is a bottom plan view of my new invention; and,
FIG. 7 is a top perspective view of my new invention in an open mode.
The broken lines indicating trophies are for purposes of illustrating a use and form no part of the claimed design. The drawings are lined for color in FIGS. 1, 5, 7, wherein vertical lines stand for red and horizontal lines stand for blue.