Quiet Street Antiques of Bath has dated this piece to the 1800s.
The case measures 16ins wide; 8 ins deep and 2.5ins high.

In the "Dictionary of London Gunmakers 1350-1850" J. Tarratt is listed as making guns in London c1830-40, though it is believed he was born in Liege Belgium and produced guns there before these dates. Thereare also records of guns by "J. Tarratt" and "Tarratt & Sons" in America, and it is possible that he and his family emigrated there.
Quiet Street Antiques of Bath has dated this piece to the 1800s.
Fine antiques at sensible prices
You can view the stock and full dealer information on the Quiet Street Antiques of Bath Profile Page