The ornamental design for a dress shirttiewindowcollar, as shown and described.
FIG. 1 is a front perspective view of a dress shirt tie window collar showing my design, with a necktie being illustrated in broken line to show the environment;
FIG. 2 is a back perspective plan view of the design shown in FIG. 1, with the collar being unfolded;
FIG. 3 is a back plan view of the design shown in FIG. 1, with the collar being unfolded;
FIG. 4 is a front plan view of the design shown in FIG. 1, with the collar being unfolded;
FIG. 5 is a right side elevational view of the design shown in FIG. 4;
FIG. 6 is a left side elevational view of the design shown in FIG. 4; and,
FIG. 7 is a top end view of the design shown in FIG. 4.
The broken lines shown on the collar are stitch lines and are part of the claimed drawing, while all other broken lines shown in the figures are included for environmental purposes only and form no part of the claimed design.