AK 6(B class) named `Raj Nandini' is a 2'6" gauge 0-6-4T engine built by Bagnall in 1916 and now plinthed outside Howrah station. This locomotive is from Ahmadpur-Katwa (and hence christened AK) narrow gauge section of ER. Some believe it to be actually AK 9. Kindly move this here