The WAGR Msa class was a class of 3 ft 6 in (1,067 mm) gauge 2-6-0+0-6-2 Garratt-type articulated steam locomotives. The class was built at the Midland Railway Workshops in Midland, Western Australia, and was operated by the Western Australian Government Railways (WAGR) between 1930 and 1963.The class was preceded on the WAGR system by the M and the Ms Garratts.