Boss & Co Gunmakers Ltd

Whilst many makers of fine English shotguns can trace their ancestry back a considerable number of years, Boss & Co can claim to be one of the longest established, dating back to 1773 when William Boss began his gunmaking apprenticeship in Birmingham.
In the late 18th century, William Boss moved to London to work for Joseph Manton, and his son Thomas Boss (1790 – 1857) followed in his father’s footsteps to serve his apprenticeship under the great master himself.
Completing his apprenticeship in 1812, Thomas Boss set up business and moved to the prestigious address 73 St James' Street, which was synonymous with Boss & Co in the 19th century. From the outset, Thomas Boss only produced one quality of gun, the best, and this policy has continued through to the present day with Boss & Co being the “builders of best guns only”.

http://www.bossguns.co.uk/history.asp