Technical drawing numbers
S2506/1Record of amendments
S2506/2Locking sketch
S2506/3Mechanical locking table
S2506/4Detection table
S2506/5Electrical control table
S2506/6Dog chart
S2506/7Lever leads
S2506/12Box diagram

A McKenzie & Holland box was built here in about 1876 with a 25 lever frame.
‹‹UP  Click below to move to adjacent box  DOWN››
St Briavels  ——  This box   ——  Wye Valley Jcn

The diagram below is a low-resolution version to indicate the content: a full-resolution 'pdf' file has been published on CD-ROM (GW Sections G, R & S). The diagram itself has not changed (other documentation may have been added or the diagram renumbered or paired) since publication.

For availability and ordering information, click on the image below.

This page last updated on 4th August 2009.