Cloth Seal, Dye Seal, Dyer's One-Part Seal, NR, 1575~1700, Image by Derfel, Found by Peter Olivant.
Found on Thames Fore Shore, 11mm.
Iota-chi cross within a decorated arch // 24 over three pellets
A one piece seal with a slot through its middle for an attachment tape. Probably a dyer's seal unusual to find a stamped number with pellets on the reverse.