Cooke and Wheatstone double needle telegraph, 1844
1844
Telegraph instrument; single needle
Telegraph block instrument
Telegraph Block Instrument, Tyers Train Describer
Telegraph block instrument; Walker's
1865
Telegraph block instrument, Great Eastern Railway
Telegraph block instrument, South Eastern Railway
circa 1905
Telegraph block instrument; South Eastern Railway; Walker's patent No. 245
1855
Telegraph block instrument; "Niddrie North"; made by W R Sykes Interlocking Signal Co Ltd
Tyers Train Describer, North British Railway
Telegraph block instrument (sending and receiving)
Telegraph block instrument (sending)
Telegraph block instrument, early Walker's type
Telegraph block instrument; Walker's type
Telegraph block instrumet; "Niddrie North Junction"; made by W R Sykes Interlocking Signal Co
Telegraph block instrument (sending and receiving)
Telegraph block instrument, Preece's type
Telegraph block instrument in green metal case
Telegraph block instrument (sending)
Double needle telegraph instrument
Telegraph block instrument (sending/receiving)
Telegraph block instrument
Single-line instrument (sending/receiving)
Telegraph block instrument (sending/receiving)
experimental Lodge-Muirhead wireless telegraph receiver, 1900-1910
1900-1910
Great Western Railway Lamp Indicator
Three telegraphic signalling block instruments
Route indicator, Caledonian Railway
Telegraph Instrument, "15 to Mitcham Junction"
Telegraph Instrument
Morse Key
1940-1945
Telegraph Sender
1918-1923
Magneto-electric telegraph
Automatic cable code submarine telegraph transmitter by James White
1877
Telegraph Instrument, Sutton Junction
London & North Western Railway telegraph block instrument
Peas & Partners Alphabetical Telegraph Instrument
1846
Fletcher's double-line block instrument, London & North Western Railway
Telegraph block instrument; Sykes' Lock and Block with integral semaphore indicator
Alexander Bain's telegraph instrument
1846
Telegraph instrument, semaphore distant signal repeater
Telegraph Block Instrument; Tyers Train Describer
Alexander Bain's telegraph instrument
1846
Telegraph Block Instrument from Southerham Junction
Telegraph Block Instrument; Tyers Train Describer
Telegraph block instrument
Telegraph Block Instrument; Fletcher's Type Train Describer
Telegraph instrument
Experimental Lodge-Muirhead wireless telegraph receiver, 1900-1910
1900-1910