Skin testing-device system
US D624195 S1
The ornamental design for a skin testing-device system, as shown and described.
FIG. 1 is a top front perspective view of a skin testing-device system showing our new design;
FIG. 2 is a top left perspective view thereof; and,
FIG. 3 is a top front perspective view thereof.
The broken lines are for illustrative purposes only and form no part of the claimed design.