One-piece Watch Strap Case

FIG. 1 is a top perspective view of a one-piece watch strap case, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines in the drawings illustrate the portions of the one-piece watch strap case, which form no part of the claimed design.