This is a Slaters 7mm scale 7040S 7 Plank Open Wagon G. Simmons Coal Merchant, Walthamstow. These wagons are based on the Railway Clearing House regulations of 1907. Charles Roberts as a major wagon builder must have had a considerable influence in the drawing up of these regulations. This is evidenced by the fact that the wagons being built by Roberts in the 1900s, on which this kit is based, were virtually indistinguishable from the 1907 design.
This 7mm ('O' Gauge) side door only wagon was built as part of a batch of 4 for G. Simmons of Walthamstow. They were built in 1906 and numbered 40, 50, 60 and 70, this was a common practice by owners who did not want people to know how many wagons they owned. G Simmons was based on Hoe street, which was situated on the G.E.R. Chingford branch, so it is likely that his coal came from either Yorkshire, Derbyshire or Nottinghamshire.
These wagons were registered by the Great Eastern Railway, and were liveried in either dark grey or red, with matching sole bars, lettered white as was typical of the period they were fitted with a brake on one side only.