This 4mm. scale BR Class 31/1 A1A-A1A Diesel Locomotive fleet number D 5531 in green livery with late crest was released by Airfix in 1977 with production running until 1981 (cat. ref. 54101-9). The model is in good running order and very good little-used condition with box code “C”. The traction tyres are in sound condition as is the cab glazing. It has the original box, which is in very good condition with undamaged vision panel and inner tray.