Lucknow's Jumbo WDM-2(A/B)#17827 'PRABAL' derated for yard shunting purpose. Could not simply make out whether it was WDM-2A or WDM-2B as both A and B were written! Perhaps not so important for a derated loco used for shunting duty. On 30th January, 2012 (Santulan Mahanta)