Cloth Seal, Cloth Worker's Personal Seal, Privy Mark, PR

Cloth Seal, Cloth Worker's Personal Seal, Privy Mark, PR, Image & Found by Niels Henrik Andreasen.
Found in the renaissance fortress of Kastellet in Copenhagen, 24mm, 12.3g.

58 ring of thorns border // privy mark incorporating PR and possibly other letters, foliate design around

From the finder, "A cloth worker's seal from the renaissance fortress of Kastellet in Copenhagen. This seal is from an archaeological feature that can be dated c. 1700-1725. It has a figure 4 above PR and a small c to the side."

Cloth fibres trapped inside?