Purchased as two four-wheel carriages in 1873 from the Metropolitan Carriage & Wagon Co., Ltd., of Saltley Works in Birmingham and later allocated fleet numbers B.12 and C.5, by 1881 these two carriages had become close coupled and were later mnounted on a new steel underframe, again supplied by the Metropolitan Carriage & Wagon Co., Ltd., in 1911 to become F.71.  The carriage in this form survived in service until 1972 when it was withdrawn and stored; the bodies were removed and destroyed in 1982 and the underframes retained as a bogie runner but were later withdrawn and are today stored at Douglas Station.