The Landquart-Davos G 2x2/2, also known as the Rhaetian Railway G 2x2/2, and, from 1910 to 1911, as the Rhaetian Railway G 2/3+2/2, was a two-member class of metre gauge Mallet-type steam locomotives manufactured by J. A. Maffei in Munich, Germany. Both locomotives in the class entered service in Switzerland in 1891. They were rebuilt in 1910–1911, but became surplus to requirements in 1920. They were then sold and sent to Brazil, where they continued to operate until about 1940. The two members of the class were so named under the Swiss locomotive and railcar classification system. According to that system: G 2x2/2 denotes a narrow gauge steam locomotive with two trucks, each fitted with two drive axles; G 2/3+2/2 denotes a two bogie narrow gauge steam locomotive, with the front bogie having three axles, two of them drive axles, and the other bogie being fitted with just two drive axles. Service history Switzerland The G 2x2/2 class was commissioned by the Landquart-Davos Railway (LD), in the Canton of Graubünden, Switzerland. Each of the two locomotives cost 68,400 Swiss francs, and joined the LD fleet in 1891. They were numbered 21 and 22, respectively. In 1895, the LD changed its name to the Rhaetian Railway (RhB), which continued to operate the class. In 1910–1911, both of the locomotives were rebuilt to coincide with a boiler exchange. As part of the rebuilding, they were fitted with a leading pony truck, and were thus modified to resemble the final member of the Rhaetian Railway G 2/3+2/2 class. In light of this modification, the two rebuilt locomotives were themselves reclassified as part of the G 2/3+2/2 class. Soon after the rebuilding of these locomotives, coal shortages during World War I called into question the further use of steam locomotives in Switzerland. The Rhaetian Railway therefore decided to electrify all of its lines on the model of the Engadine Railway, opened in 1914. The electrification project was able to be completed in 1919. In 1920, the two now surplus rebuilt locomotives were withdrawn from Rhaetian Railway service and sold to Companhia de Mineração Santa Matilde, a Brazilian mineral prospecting company. Brazil In the same year, 1920, Santa Matilde sold both locomotives to the railway company Rede Sul Mineira de Viação (SM), located in the south of the Brazilian federal state of Minas Gerais, where they were reclassified as type 2-4-4-0T, and given operating numbers