Birmingham Date Letters on Silver 1773 - 1924
The shape of the shield cartouche around the City Mark and Standard Mark generally changed to
match the shield around the Date Letter Mark, however, in the late 19th century, there were some
non-matching variations in cartouche shapes, mostly seen on watch cases and other small items.
The second mark was used from 1904 with numeric standard mark, date letter and sponsor's mark.
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