Records show that Finchley Central was officially opened by London Transport on 29th August 1926. It was built to the London Transport Type design and was fitted with a Westinghouse 'B' frame (frame number 149)
The signal box was closed and control was moved up the platform to a temp location on 22nd September 1957 so the signal box could be converted to an Interlocking Machine Room which had a 'V' style frame installed, (see last picture below) the Interlocking Machine Room was commissioned on the 26th January 1958 controlled from Leicester Square and then Coburg Street control room.