Harrow Disc Piece

FIG. 1 is a rear perspective view of a harrow disc piece; FIG. 2 is a front perspective view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a front elevational view thereof; FIG. 5 is a right side elevational view thereof; FIG. 6 is a left side elevational view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is bottom plan view thereof; and, FIG. 9 is rear perspective view of a harrow disc piece as in FIG. 1 showing a second harrow disc piece in broken lines forming an assembly therewith. The broken lines form no part of the claimed design.