The Hampden Park Signal Box was demolished at the weekend.
The operation to remove the box, built in the late 1880s, started at 8pm Friday night and finished Monday morning.
It was not listed by English Heritage during a national survey of boxes.
The weekend demolition was part of a multi million signalling improvement programme across East Sussex.
Other signal boxes at Berwick, Polegate, Eastbourne, Norman’s Bay, Bexhill and Pevensey were all de-manned at the weekend and signalling is now controlled at Three Bridges.
A spokesperson for Network Rail said, “The work was completed as planned, including the demolition of the signal box at Hampden Park, which was carried out on Saturday afternoon.
“There was a small overrun early Monday morning which caused some minor disruption to the first services of the day, including two cancellations. Normal service was resumed by 7am.”
Photos by Mark Dimmock, Phil Clements and Andy Butler.