Block instrument (lock and block)
1897
Signal Block Bell, South Eastern Railway
1862
Train staff and ticket box
Telegraph block instrument
Wise's Patent Train Staff
1886
Five-needle train signalling instrument used on the London and Blackwall Railway
1840
British Railways Detonator Tin
Telegraph block instrument; 3-position single-needle
Telegraph block instrument (sending), Great Northern Railway
Block instrument (permissive indicating)
Exploded Duplex Detonator
Specimen of First Telegraph Line, 1837
1837
Clark's block signalling telegraph instrument, 1854
1854
Cooke's train signalling instrument of 1845, Norfolk Railway
1845
Telegraph instrument; single needle
Telegraph block instrument
Station bay indicator
Telegraph block instrument; Walker's
1865
Telegraph Block Instrument, Tyers Train Describer
Telegraph block instrument, Great Eastern Railway
Telegraph block instrument; South Eastern Railway; Walker's patent No. 245
1855
Telegraph block instrument, South Eastern Railway
circa 1905
Telegraph block instrument; "Niddrie North"; made by W R Sykes Interlocking Signal Co Ltd
Signalling instrument
Tyers Train Describer, North British Railway
Telegraph block instrument (sending and receiving)
Single-needle block instrument
1845
Train Describer, 1880-1920
1880-1920
Two-plunger block instrument pattern 288
Telegraph block instrument (sending)
Telegraph block instrument, early Walker's type
Telegraph block instrument; Walker's type
Signalling instrument
Telegraph block instrument (sending and receiving)
Pair of climbers for climbing telegraph poles
1948
Signal relay box
Telegraph block instrumet; "Niddrie North Junction"; made by W R Sykes Interlocking Signal Co
Great North of Scotland Railway Detonator Box
Telegraph block instrument, Preece's type
Signalling instrument
Reversible line indicator
Telegraph block instrument in green metal case
Block instrument
Double needle telegraph instrument
Telegraph block instrument (sending)
Intermediate block instrument
Spagnoletti intermediate signalling instrument
1885
Block instrument (sending)
