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Block instrument (sending/receiving) - Caledonian Railway

Block instrument (sending/receiving)

Single-needle block instrument

1845

Clark's block signalling telegraph instrument, 1854

1854

Block instrument (sending)

Block instrument (sending/receiving)

Block instrument (lock and block)

1897

Two-plunger block instrument pattern 288

Block instrument

Block instrument (permissive indicating)

Block instrument (sending/receiving)

Intermediate block instrument

Lancashire & Yorkshire Railway Signalling School Model Railway Layout

1912

London & North Eastern Railway train describer

1923-1948

Lock & Block Type Telegraph Block Instrument

Telegraph Block Instrument, Markham North

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Block instrument with spagnoletti flag indicator (incomplete); GWR. Tyer's style

Train describer (receiving) Great Western Railway

Telegraph Block Instrument; Tyers Patent; 2-position type

Telegraph block instrument

Tyer's One-Wire Three Indication Block Instrument

Telegraph block instrument

Three-wire block instrument

Telegraph block instrument, London Brighton & South Coast Railway

Telegraph block instrument

Telegraph Block Instrument, Great Western Railway Spagnoletti receiving type

Single-needle telegraph block instrument

Block instrument, Great Central Railway (sending)

Telegraph Block Instrument, Signal Relay, Great Western Rail

Telegraph Block Instrument, Great Western Railway

Telegraph Block Instrument, Spagnoletti type

Telegraph block instrument, old form of bell instrument

Train describer (receiving)

Train describer, London & North Eastern Railway

1923-1948

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Lock and Block Type Block Instrument

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Telegraph Block Instrument, Lock & Block Type, W R Sykes & Co

Siemens Bros. block

Block instrument by J.R. Spagnoletti and Crooks; GNR

Telegraph Block Instrument, Great Western Railway

Block instrument (sending/receiving)

Telegraph block instrument, block bell, ground frame type