Opus Antiques has dated this piece to the Victorian era.
F means that the clock should be faster than the dial S slower.

Early to mid 1800's.
Item is not signed, but the hidden hinge tabs and the check-mark shaped clasp hooks were only ever used by F. Barker & Son prior to 1875. The dial is also a very typical Barker dial.
Opus Antiques has dated this piece to the Victorian era.
Antique treen, boxes & decorative georgian items
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