Chester Date Letters on Silver      1701 - 1925

The shape of the shield cartouche around the City Mark and Standard Mark generally
change to match the shield around the Date Letter Mark.
Chester Import Marks on Foreign Made Silver      1867 - Present

The "F" was used, 1867 - 1904, in conjunction with a full set of Chester hallmarks.
The second mark was used from 1904 with numeric standard mark, date letter and sponsor's mark.

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