The ornamental design for a wristwatchdial as shown.
FIG. 1 is a top plan view of a wristwatch dial showing my new design, the
bottom plan view being flat, plain and unornamented, the dotted line
showing of a wristwatch's hands and case are for environmental purposes
only and form no part of the claimed design; and
FIG. 2 is a right side elevational view thereof, all other elevational
views being substantially the same.