Brown, Marshalls and Co. Ltd.
They were formed in 1840. In 1866 they built the original batch of four-wheel coaches for the Talyllyn Railway, which are still in operational use, and in 1873 built two bogie coaches for the Ffestiniog Railway. These were the first iron-framed bogie coaches in Great Britain. These are also still in regular use.
In 1902 they became part of the Metropolitan Amalgamated Railway Carriage & Wagon Company, which eventually formed part of Metro-Cammell - a company that continued to build rolling stock in Birmingham until 2005.