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The BNR was the last major guaranteed railway formed, with the system from the outset owned by the GoI who contracted the BNR company to manage matters, initially for 25 years and therafter determinable every 10 years. The BNR was the last company to be nationalised, on 1 October 1944. In 1952, the BNR was merged with the [[East Indain Indian Railway]] to form Indian Railways' '''Eastern Railway''' but in 1955, BNR re-emerged to form '''South Eastern Railway'''.