Telegraph block instrument, London Brighton & South Coast Railway, single-needle type. London Brighton & South Coast Railway single needle block intrument
Telegraph block instrument, Midland Railway, 3-position non-pegging block instrument. Non-pegging block instrument, Midland Railway
Telegraph block instrument, Glasgow & South Western Railway, 3-position type, with combined bell tapper and bell, from Beith North signalbox. Telegraph block instrument
Telegraph block instrument, 2-position sending and receiving type, with combined gong, Up train on line/Train arrived. Telegraph block instrument
Telegraph block instrument; GNR. Harper's non-pegging absolute 1-needle 3-position/3-indication. Telegraph block instrument
Telegraph block instrument, train describer, receiving, ex Chester, LNW Goods/GW Goods etc Telegraph Block Instrument, Train Describer
Telegraph Block Instrument, two position, with bell and tapper, no provenance. Telegraph Block Instrument
Telegraph Block Instrument, Great Eastern Railway, 2-position absolute block type, sending and receiving with tapper and combined gong. Telegraph Block Instrument