Cloth Seal, Shield with Three Crowns and Helmet, Image & Found by Jon5379
Found in Yorkshire, "it's about the same size as a 10p."
Ornate cloth seal. The most distinct feature is what appears to be three tall crowns beneath an ornate helmet. See No.311 Fig.41 Egan, 'Lead Cloth Seals and Related Items in the British Museum' - Cologne.