Records show that Finchley Central was officially opened by London Transport on 1st April 1940, though speculation thinks it may have opened before that date due to the war. It was built to the London Transport Type design and was fitted with a Westinghouse 'N' frame (frame number 193)
The signal box was closed and control was moved up the platform to a temp location on 14th October 1967 so the signal box could be converted to an Interlocking Machine Room, the Interlocking Machine Room was commissioned on the 13th December 1969 controlled from Coburg Street control room.