On the left we have the Westinghouse lever frame and its illuminated diagram in Drayton Park Signal Cabin, taken around September 1975. The left hand end of the frame and diagram would have catered for the link to Finsbury Park high level and beyond, but with the post-war cancellation of the Northern Line extensions, only the original terminal platforms at Finsbury Park remained. These were closed in 1964 as part of the Victoria Line works, leaving the frame and diagram rather 'lop-sided' until closure in 1975.
This photograph was taken in Spetemnber 1975, and is reproduced by kind permission of © Peter Coath.
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