Starting with the 1974 summer timetable period , on 26 May 1974 , the Gottardo was extended from Milan to Genoa ( Brignole station ) .
This portion operated only during the summer timetable periods .
Starting with the 1974 summer timetable period , on 26 May 1974 , the Gottardo was extended from Milan to Genoa ( Brignole station ) , but this portion operated only during the summer timetable periods .