In 1907 the Railway Clearing House (RCH) prepared a set of regulations for the construction of goods wagons, aimed at standardising specifications and parts such that wagons could be repaired quickly at remote locations. In 1923 an updated RCH specification was released which included grease or oil axleboxes, universal brake shoes, etc. In addition to the private wagon builders most of the big four railway companies adopted RCH standards for their own wagons to some degree, the LMS and LNER both building many thousands of RCH standard pattern open wagons.
The model represents the RCH 1923 7-plank body design with side and end doors or side doors only, depending on the decoration requirements. The door on one side is a separate part and can be repositioned in the open position to simulate being unloaded in the yard.
Almost 240,000 standard 16 Ton mineral wagons and constructed in the 1950s, with almost 300,000 examples when the similar earlier designs are added up. The vast majority were of all-welded construction, resulting in a stronger and lighter wagon then when traditional construction was used, but some private builders continued to produce rivetted wagons as they transitioned to the new construction techniques. The main use was for shipping of coal although sugar beet, scrap metal, spoil and aggregates were also carried. Initially built with top flap doors BR instigated a massive rebuilding programme during the 1970's, making renewed wagons using the good chassis. The top flap door was omitted at rebuilding, providing a stronger body with a continuous top rail.
The wagon models are built to a ratio of 1:43.5, 7mm scale and fitted with finescale wheels for 0 gauge track. The body is made of ABS plastic incorporating fine detailing and fully finished appropriate era decorations. The chassis contains a die-cast metal floor to add weight, a compensating beam on one side to improve running performance, brass bearings, die-cast wheels with steel tyres, sprung metal buffers, sprung die-cast hook and metal coupling links. Solebars, axleboxes and brake gear components are moulded in ABS plastic for strength.