Jason Clarke Antiques has dated this piece to the 1880s.
Both Dollond and Negretti & Zambra were the only suppliers deemed of sufficient quality and standards to produce this design and these barometers were used on fishing vessels towards the end of the century.
Following this success, Dollond moved to The Strand where John Dollond was appointed optician to George III and the Duke of York in 1761.

Continuing in family ownership after John’s death. The Dollond name continued to be associated with royalty and went on to win a Great Exhibition Medal for “instruments for recording meteorological information on a strip of paper” (barographs). It is still in existence today as the optician Dollond & Aitchison, having been acquired by James Aitchison in 1927.

All examples by either supplier are manufactured with a painted zinc metal casing and a ceramic dial enclosed behind a brass bezel with thick glass insert.
Difficult to find in this condition as most suffer from cracks and breakages to the ceramic dial, this is a great example of an aneroid barometer from one of the highest quality makers of scientific instruments during the nineteenth century.
Jason Clarke Antiques has dated this piece to the 1880s.
You can view the stock and full dealer information on the Jason Clarke Antiques Profile Page