Cloth Seal, Privy Mark, Arms

Cloth Seal, Privy Mark, Arms, Image & Found by Stuart Wyatt.
Found on the Thames foreshore near Queenhithe Dock and Southwark Bridge, 20mm.

Possibly arms on a shield // privy mark

The third image shows the markings on the head of the rivet once the seal has been opened to expose it. Possibly a cloth worker's personal seal.