The GWR introduced a 14t ballast carrying open wagon made of steel in 1899 and, with an increase in length to 20ft. were built upto, and after, nationalisation. Churchward and Morton brake riggings were used. The branding LING was only occasionally carried. The CO mark dates back to at least 1929 on the GWR and means vehicles under the control of the Chief Office.
![DW30662 ZCO 'Ling' 14t [1]](/img/s/v-10/p904850431-11.jpg)
