Part of Spectacles

FIG. 1 is a perspective view of the part of spectacles showing my new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a right-side view thereof; FIG. 5 is a left-side view thereof; and, FIG. 6 is a top plan view thereof. The bottom view is omitted since it forms no part of the claimed design. The broken lines shown form no part of the claimed design.