Coil J wagons were used by British Railways in South Wales to carry strip coil. With Coil C's they were the last unfitted wagons in regular revenue use on BR. Cold strip coils was covered for transport. The means of wrapping the coils altered with time - a variety are shown - at any one time all of the wrappings would have been similar. Hywel Thomas has explained the numbers in the central box is an RTB fleet number, later many appear to have this replaced by a POOL number or plain paint
