Hardback volume, "Railway Signalling and Communications Installation and Maintenance (1st Edition)", Good condition, faded spine. Published December 1940 (date quoted in second edition: 2002-7046) Railway Signalling and Communications Installation and Maintenance (1st Edition)
Hardback volume, "Railway Signalling and Communications Installation and Maintenance (2nd Edition)" hand made cloth cover. Fair condition, discolouration. Railway Signalling and Communications Installation and Maintenance (2nd Edition)