4F-059-002 14T Tank Wagon Class B Esso Black 1869The majority of these tank wagons were built between 1939 and 1944 as Class A wagons for aviation fuel, being 17ft 6inch long on a 10ft wheelbase fitted with RCH either side braking and split oil axle boxes. The tank was 7ft 2inch diameter containing 4275 gallons saddle mounted with two small platforms on the top of the tank. After the war and around 1947, surplus tank wagons were converted to Class B fitted with heating coils to help discharge of