SN.31R: Difference between revisions

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It could display yellow or green.
It could display yellow or green.
==Abolition==
When the signal was abolished it was replaced with [[UM.92]].

Latest revision as of 21:38, 8 February 2016

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Creation

This signal was brought into use in December 1970 to repeat SN.31:

1970-04.png

It could display yellow or green.

Abolition

When the signal was abolished it was replaced with UM.92.