TB 4 is a 2'6" gauge 4-4-0 Bagnall product built in 1945 for Tezpore - Balipara Railway. Along with sister engine TB 6, a 4-6-0, it spent its working life at Clutterbuck Ganj(C.B. Ganj) creosoting Depot near Bareilly. Here seen plinthed at Izzatnagar Divisional office. TB 6 is preserved at North Eastern Railway Headquarters at Gorakhpur.