The ornamental design for an anchor, as shown and described.
FIG. 1 is a right side elevational view of an Anchor showing our new design, the left side being a mirror image thereof;
FIG. 2 is a top plan view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a top, right front perspective view thereof;
FIG. 6 is a top, right rear perspective view thereof; and,
FIG. 7 is a bottom plan view thereof.
The structural features depicted by broken lines in FIGS. 1 through 7 have been shown for the purpose of illustrating portions of the anchor that form no part of the claimed design. The anchor is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.