The GWR was a pioneer in the introduction of iron chassis, and logically continued this development to include bodies from the late 19th century. This resulted in the famous Iron Mink, and over 25 years, some 20,000 or more entered service, lasting until the 1950s in revenue and the 1980s in departmental use. The design was so successful that it was copies by several other railways and private wagon builders. Further historical information can be obtained from ‘GWR Iron Minks’, published by the H.M.R.S.
The model features a plastic injection-moulded body and chassis, metal-tyred wheels on pin-point axles fitted in compensated axle-boxes, sprung buffers and hook draw-gear with three-link couplings. One livery only remains – British Railways unfitted grey.