The ornamental design for a wall-mounted coil for holding a hairdryer, as shown and described.
FIG. 1 is a perspective view of a wall-mounted coil for holding a hair dryer inner workings with my design, with an unclaimed hair dryer being shown in broken lines;
FIG. 2 is a perspective view similar to FIG. 1, but without the broken line depiction of the of the hair dryer;
FIG. 3 is a top plan view of the wall-mounted coil for holding a hair dryer of FIG. 1;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a side elevational view as viewed from the left side of FIG. 4;
FIG. 6 is a side elevation view as viewed from the right side of FIG. 4;
FIG. 7 is a rear elevational view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines showing the hair dryer in FIG. 1 depict environmental subject matter only and form no part of the claimed design.