FIG. 1 is a perspective view of the lower stop device for an invisible zipper in accordance with the embodiment of the claimed design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is an exploded perspective view thereof;
FIG. 9 is an exploded perspective view thereof applied to a zipper strap; and,
FIG. 10 is an assembled perspective view thereof applied to a zipper strap.
It being understood that the broken lines are for illustrative purposes only and form no part of the claimed design.