From Peter Maunder. "The Fox archive document tells what seals were being used in 1754, and it is clear that the Enchmarch family used Theodore Wilson too.
The initials on the rivet disc are interesting, and it seems very likely that the "E" is for Enchmarch, T and ?R below being Thomas and Richard, either side of the 21 1/2.
Thomas and Richard Enchmarch were trading between 1770 and 1780."