Worboys Antiques has dated this piece to the 1850s.
It is signed by the maker, J. Newman of 122 Regent Street, London.

John Frederick Newman worked in Regent Street 1827-1862.. He made standard hand portable barometers for The Ross Antarctic expedition and his equipment was installed all over the British Empire. He invented several devices, exhibited at the Great Exhibition and was "without doubt, the leading scientific barometer maker of his day". A testament to this was that his business was taken over by Negretti and Zambra in 1862.
Current Condition
In excellent condition and working order.
Dimensions
10.00cm wide 92.00cm high 6.00cm deep (3.94 inches wide 36.22 inches high 2.36 inches deep)
Worboys Antiques has dated this piece to the 1850s.
Established since 1978, dealing in and restoring most antiques, specialising in clocks and furniture.
You can view the stock and full dealer information on the Worboys Antiques Profile Page
Worboys Antiques is a registered member of LAPADA