Caledonian Railway 812 and 652 Classes

The Caledonian Railway 812 and 652 Classes were 0-6-0 steam tender locomotives designed by John F. McIntosh and introduced in 1899 for express-freight and mixed traffic on the Caledonian Railway. They carried the same large boiler type as the Dunalastair 4-4-0s, working at 160 psi, and could easily reach 55 mph. Ninety-six were built, some by outside contractors because the need was urgent, and a later batch of 17 with minor differences became the 652 class in 1908 and 1909. They hauled boat trains to Gourock and Wemyss Bay, coal trains from the Lanarkshire coalfields and fast fish trains. Every engine achieved more than a million miles, the first-built 812 reaching 1,574,248. The class was withdrawn between 1946 and 1963, and number 828 is the sole survivor. The Belgian State Railways derived 891 locomotives in three types from the design.