All brass bodywork, hand soldered with lost-wax brass fittings. Working corridor connections of the correct pattern and style for the period. Sprung steel headed buffers and working screw couplings. Vacuum and steam heating pipes with minituture connectors. Electrical jumpers cables and storage brackets. Steel wheels (insulated for 2-rail tracks) running in brass sleeve bearings. Glazed windows with fully detailed interiors. Hand painted and lined to museum standards. In summary these vehicles look good enough to mount in a glass case as a collector's piece and yet are strong enough to run on a garden railway.