The ornamental design for municipal casting portion, as shown and described.
FIG. 1 is a perspective view of a municipal casting including the municipal casting portion embodying the new design;
FIG. 2 is a perspective view of the municipal casting portion;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image thereof; and,
FIG. 5 is a front elevational view thereof, the back elevational view being a mirror image thereof.
FIG. 1 shows portions of a municipal casting in phantom lines. The phantom line portions are shown for environmental purposes and form no part of the claimed design. Further, the phantom lines immediately adjacent the solid-line portions of the design form the boundary of the design, which the phantom lines forming no part of the claimed design.