The Caledonian Railway 60 Class were 4-6-0 passenger engines designed by William Pickersgill and introduced in 1916. Six locomotives were constructed by the Caledonian Railway at its St. Rollox works between 1916 and 1917, all of which transitioned to LMS (London, Midland and Scottish Railway) ownership in 1923. An additional twenty locomotives, featuring slight design modifications, were produced under the direction of George Hughes for the LMS between 1925 and 1926.

While the 60 Class locomotives were robust and free-steaming, they were also unsophisticated and exhibited lethargic performance given their size. Although initially classified as passenger locomotives by the LMS, they were frequently deployed on goods trains in later years. This shift in usage earned them the nickname Greybacks, likely referencing their long, grimy boilers. Alternatively, the nickname may have been an insult coined by former Glasgow and South Western Railway enginemen, as "greyback" was an old term for a louse.Atkins, C. P. (1976), The Scottish 4-6-0 Classes, Ian Allan, p.53

Withdrawals began in 1944, but twenty-three locomotives entered British Railways in 1948. The final locomotives were withdrawn and scrapped in 1953.

Numbering and locomotive histories CR no.LMS no.BR no.BuiltWorksWithdrawnNotes 14630 54630 7/1925 St Rollox 12/1951 14631 54631 11/1925 St Rollox 5/1948 BR number never carried 14632 1/1926 St Rollox 7/1947 14633 5/1926 St Rollox 3/1946 14634 54634 5/1926 St Rollox 11/1952 14635 54635 6/1926 St Rollox 1/1952 14636 54636 6/1926 St Rollox 2/1953 14637 54637 7/1926 St Rollox 3/1948 BR number never carried 14638 54638 7/1926 St Rollox 5/1951 14639 54639 8/1926 St Rollox 12/1953 14640 54640 8/1926 St Rollox 10/1952 14641 54641 9/1926 St Rollox 11/1948 BR number never carried 14642 54642 9/1926 St Rollox 10/1949 14643 54643 10/1926 St Rollox 2/1948 BR number never carried 14644 54644 10/1926 St Rollox 4/1948 BR number never carried 14645 54645 11/1926 St Rollox 7/1950 BR number never carried 14646 54646 11/1926 St Rollox 3/1949 BR number never carried 14647 54647 11/1926 St Rollox 3/1951 14648 54648 12/1926 St Rollox 11/1951 14649 54649 12/1926 St Rollox 10/1951 60 14650 54650 11/1916 St Rollox 9/1953 61 14651 54651 12/1916 St Rollox 3/1950 62 14652 54652 1/1917 St Rollox 11/1948 BR number never carried 63 14653 54653 2/1917 St Rollox 7/1949 BR number never carried 64 14654 54654 3/1917 St Rollox 1/1952 65 14655 4/1917 St Rollox 1/1944 sources Longworth (2005)Longworth, Hugh (2005), British Railway Steam Locomotives 1948-1968, page 166 and RailUK

Technical details Pickersgill Caledonian Railway design See box, top right.

Hughes LMS development of Pickersgill design The locomotives built by the LMS had slightly larger cylinders and weighed slightly less than the original CR locomotives. Details were as for the CR locomotives except:Atkins, C. P. (1976), The Scottish 4-6-0 Classes, Ian Allan, p.109

Introduced: 1925 Boiler Pressure: Two cylinders: Loco Weight: Tender Weight: Starting tractive effort:

References