Catalogue entry no. 517 by Max Loehr:
517 Squarish Bead with Flanges
Pale Green and creamy brown jade tube, squarish in cross-section, and having a wide perforation. The corners are accentuated by pairs of prismatic flanges. Thinly incised double lines are placed diagonally on the four sides; the ends are marked by striated bands. One end is notched at the opposite sides and provided with three tiny drill-holes. Late Eastern Chou or earlier.