Catalogue entry no. 205 by Max Loehr:
205 Trapezoidal Knife
Sturdy blade of black stone with a straight back and oblique lateral edges. The blade is broken off at the right end, so that part of a perforation remains; the facets forming the cutting edge show, however, that the fracture occurred before they were ground. Two small conical perforations are placed parallel to the back, an incomplete one, made with a larger, hollow drill, is placed near the right edge. Nearly the entire length of the upper side of the blade is hollow-ground; the underside is flat. Western Chou(?).