The ornamental design for an escutcheon, as shown and described.
In a preferred embodiment, the nature of this product is as an escutcheon primarily useful for serving as a decorative finish for plumbing fittings.
FIG. 1 is a left, top, front perspective view of an escutcheon embodying my new design;
FIG. 2 is a front elevational view thereof; and,
FIG. 3 is a left side elevational view thereof, the right side elevational view being a mirror image of the left side shown, and the top and the bottom plan views being identical to the left side shown.
The broken line representation of a hole in FIGS. 1 and 2 is for the purpose of illustration only, and forms no part of the claimed design.