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

Cloth Seal, Cloth Workers Personal, NE, Image & Found by London Mudlark.
Found on Thames foreshore

Privy mark with N P to sides // rivet head shows F

These seals were used by clothiers, weavers and searchers from the fourteenth to the eighteenth centuries. Dating by style can be very inaccurate but I think this is a later one from the end of that period.