Catalogue entry no. 399 by Max Loehr:
399 Disk with Pattern of Plastic Curls
Similar to Nos. 385, 386, 387, 388, 389, 390, 391, 392, 393, 394, 395, 396, but with more densely placed curls. The surface is almost entirely calcified and discolored, with only a few areas of the original glossy finish remaining. As in the preceding examples, the perforation is cylindrical and sharp-edged. Late Easter Chou.