McMullen's, known locally as Mac's, is a regional brewery founded in 1827 in Hertford, England, the United Kingdom. The brewery expanded during the second half of the 19th century by purchasing other breweries and their associated pubs. In 1902 it was the second largest brewery in Hertfordshire.
The Foden 'C' Type was the final design of the over type (engine above boiler) Steam Wagen developed from earlier models. This wagon was introduced in the 1920's and had a double crank compound engine which developed 23 B.H.P. at 450 R.P.M. It was fitted with a spur gearing giving speeds up to 17 M.P.H., but special gearing could be ordered which would enable the wagon to achieve 27 M.P.H. double the permitted speed limit for such wagons.