Catalogue entry no. 26 by Max Loehr:
26 Heavy Dagger-Axe
Black stone, mottled with greenish gray. The blade, rhombic in cross-section, has a median crest which descends gradually toward the point. The tang is flat and sharply set off from the blade; it widens toward the butt and is perforated in the middle by a biconical hole. The surfaces of this ko are beautifully polished. It is a rare type, and unique in this collection. Shang.