Suggest two funnelled paddle steamer bow on is CSPCo "Juno" or "Jupiter" of 1937 (appearance pre-WW2) so date is 1937-39. Turbine steamer departing "Duchess of Hamilton" or "Duchess of Montrose". LNER single funnelled paddler (centre) could be "Marmion", "Kenilworth" or "Waverley" (1899)
Report