SN.53: Difference between revisions
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Revision as of 13:24, 15 November 2014
Back to Control Functions
Alterations in connection with Reversible Signalling
From 6 November 1977 the signal was mounted on a right-hand cantilever, in readiness for the future installation of SN.653 on the same structure.
The reversible signalling was brought into use in 1980 [1].