We claim the ornamental design for a “collar plug-in for a utility meter”, as shown.
FIG. 1 is a front view of the plug-in showing our new design;
FIG. 2 is a side view of the plug-in, it being understood that the opposite side view not shown, is a substantial image thereof;
FIG. 3 is a bottom view of the plug-in;
FIG. 4 is a front perspective view of the plug-in;
FIG. 5 is a front view of a second embodiment of the plug-in;
FIG. 6 is a side view of a second embodiment of the plug-in, it being understood that the opposite side view not shown, is a substantial image thereof;
FIG. 7 is a bottom view of a second embodiment of the plug-in; and,
FIG. 8 is a front perspective view of a second embodiment of the plug-in.
The utility power pins that normally protrude from the back, are not shown for simplicity of illustration. The components shown in broken lines are for illustration only and form no part of the design.