BR MERCHANT NAVY CLASS 46235023 Holland America Line entered traffic on 9 October, 1948 and was named at a ceremony at Southampton Docks on 24 January, 1949. Repainted into British Railways experimental Steam Blue in July 1950, by the beginning of February 1952 the locomotive had reverted to British Railways Green and it was in this livery that 35023 Holland America Line was sent to BR's Test Facility at Rugby in order to work on improvements to the operation of the class.