The
making of wrought silver was recorded in Exeter in the Middle Ages. the
Roman capital letter "X", sometimes crowned, was used as a town mark in
the 16th and 17th centuries. From 1701 the Town Mark of a three towered
turreted castle was used with the re-establishment of the Assay Office
which closed in 1883. The date letter sequence started in November 1701,
then changed annually in August from 1702.