Preserved FS Class 691 4 cylinder Pacific 691022 was one of the 33-strong class which were the fastest and most powerful locomotives on the Italian railway. They were rebuilds of the 1911-14 Class 690 carried out by Ferrovie dello Stato and Ernesto Breda between 1928 & 1934.

691.011 of the class held the Italian steam speed record, recorded between Verona and Padova, of 150 kilometres per hour)