UM.79

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Origin

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Alterations in connection with Reversible Signalling

From 6 November 1977 the signal was mounted on a new gantry, in readiness for the future installation of SN.653R and DM.79 on the same structure.

1977-10.png

The reversible signalling was brought into use in 1980 [1].

  1. Signalling Notice 31/2767