Caledonian Railway 670 ClassThe Caledonian Railway 670 Class was a class of 0-4-2 steam locomotives designed by George Brittain for the Caledonian Railway and introduced in 1878.Ownership changesNine locomotives were withdrawn in 1922, or earlier. Twenty-one survived into the ownership of the London, Midland and Scottish Railway in 1923; these were withdrawn between 1923 and 1932.Numbering;Notes † locos with 140 psi pressure †† locos with 150 psi pressure