The ornamental design for a dummy controlunit for the handset and fixed vertical holder of a mobile telephoneset, as shown and described.
FIG. 1 is a left side, top and front perspective view of a dummy control
unit for the handset and fixed vertical holder of a mobile telephone set
showing my new design;
FIG. 2 is a right side, top and rear perspective view thereof; and,
FIG. 3 is a right side, bottom and rear perspective view thereof.