Quiet Street Antiques of Bath has dated this piece to the 1850s.
The ivory register plates are particularly well engraved and are signed for the maker: J.S.Marratt, King William Street, London Bridge. Both the main mercury tube and thermometer tube are original.
J.S.Marratt worked at this address from around 1845-1859 and became Marratt and Short in 1860.
Quiet Street Antiques of Bath has dated this piece to the 1850s.
Fine antiques at sensible prices
You can view the stock and full dealer information on the Quiet Street Antiques of Bath Profile Page