The ornamental design for the turkey box call, as shown and described.
FIG. 1 is a perspective view of a turkey box call showing my new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a side perspective view thereof;
FIG. 4 is a side plan view thereof;
FIG. 5 is a second side plan view thereof;
FIG. 6 is an enlarged view of right corner of the design as seen in FIG. 5 thereof;
FIG. 7 is an end plan view thereof; and,
FIG. 8 is a perspective and enlarged view thereof.
The human hand shown in dashed line is for environmental illustration and scaling purposes in order to show the relative size of the elements, and forms no part of the claimed design.