Technical drawing numbers
S174/1Record of amendments
S174/2Locking sketch
S174/3Mechanical locking table
S174/4Detection table
S174/5Electrical control table
S174/6Dog chart
S174/7Lever leads
S174/12Signal box diagram

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The diagram below is a low-resolution version to indicate the content: a full-resolution 'pdf' file will be published on a CD-ROM entitled 'Great Western Railway Signal Box Diagrams - Section A'. For availability and ordering information, click on the image below.

This page last updated on 5th February 2010.