Unofficially known as the 'Earl of Dudley's Railway', the Pensnett Railway, which served Round Oak Steel Works, originated in 1829; becoming an amalgamation of the Kingswinford Railway and the Pensnett Railway. Management of the railway came under the control of the mineral agents of the Dudley Estate and in 1900, Peckett Works No. 488/1890 Lady Edith was purchased to work over the system. Rebuilt at Castle Mill Works in 1920, the locomotive survived until 1934.
The Peckett W Class was a four-coupled, medium powered, industrial saddle tank locomotive that comprised six separate variations covering developments of locomotive design and building, from the W2 of 1884 to the W7 of 1938.
Locomotives were built at the Atlas Engine Works in St. George, Bristol, Peckett & Sons Ltd having taken over the business established there by Fox, Walker & Company in 1880.
Peckett locomotives which were noted for their fine rivet work on the cabs and tanks and the generous use of brass and copperwork continued to be built at Atlas Works until June 1958. Describing their core market as “Colleries, Ironworks, Contractors Tinplate Works etc.” Peckett took pride in turning their locos out in a lined Works livery and utilised many standard components in their construction, however the nature of the locomotives’ end use meant there were a number of alterations carried out, particularly as reduced height versions for operating in smelting works and collieries.
Although producing a serviceable 200bhp diesel locomotive design like most steam locomotive builders Peckett & Sons were unable to survive the changing rail freight patterns and availability of surplus ex-BR shunting engines. The company was bought out by Reed Crane & Hoist Company during 1961, having produced 140 W4 locomotives between April 1885 and February 1906.
The Peckett company name was still recorded by Companies House as a dormant company until the 1990s and surviving company records and drawings are now held by the National Railway Museum.