The bigjigs rail heritage collection offers a delightful range of replicas from the golden age of rail the packaging includes information about the evolution and working life of the engine upon which the replica is based bigjigs rail black engine the original is kept by the mid hants railway preservation society at the watercress line in the uk magnetic couplings ensure compatibility with all other engines and carriages in the bigjigs rail range the bigjigs rail black engine consists of 2