English, 14th century.
Measures 4.3 x 2.8cm.
Provenance: Thames foreshore find.
Recorded on the portable antiquities database, Unique ID: LON-9CE13D.
Where it is described as follows:
A Medieval lead alloy incomplete pilgrim badge of the Head Reliquary of Thomas Becket dating to the 14th century. It depicts the face of the saint wearing his bishop's mitre, all is cast in high-relief. Mitre is picked out using pelleted design and has twisted vine work in the spaces. Eyes are ovate and mouth is oval, there is hair covering the ears. The reverse of the object is a undecorated with a mould line running the length of it from top to bottom. There is the remains of a small integrally cast projecting spur that would have formed part of the pin attachment, now missing. Parallels can be found in Spencer 1998 no.112-118b, and it is likely that this piece originally depicted the saint's shoulders and mantle. See also finds: LON-0801CB, SWYOR-B6B054, LON-97445B and LON-973A97 on the PAS database.
https://finds.org.uk/database/artefacts/record/id/827076