Catalogue entry no. 340 by Max Loehr:
340 Asymmetrical Knife
Mottled gray-green and russet stone blade with straight edges; the blade narrows in width toward the right edge. The back is thin; the thickness of the blade is greatest above the strongly beveled cutting edge. Two wide perforations along the back are drilled from the upper side. Saw marks at the left edge. Eastern Chou or Han(?).