older 2-8-2 Mikado classes, the Class D50, Class D51 and Class D52. In 1950 and 1951, twenty Class D62 2-8-4 locomotives were rebuilt from Class D52 at the JNR's Hamamatsu Works. Between 1951 and 1956, 78 Class D60 2-8-4 locomotives were rebuilt from Class D50 at the JNR's Hamamatsu, Nagano and Tsuchizaki Works. In 1959 and 1960, six Class D61 2-8-4 locomotives were rebuilt from Class D51 at the JNR's Hamamatsu and Kōriyama Works. Some of these locomotives survived in service up to the end of steam traction on the JNR in 1974. Mexico In 1951, Mexico's Ferrocarriles Nacionales de México (N de M) bought five 2-8-4 locomotives, built by Baldwin Locomotive Works in 1940, from Norfolk Southern Railway in the United States of America (USA), where they had become redundant due to dieselisation. Before their arrival in Mexico, all five went through a complete major overhaul in the USA. They arrived in Mexico late in 1951 and were allocated N de M numbers 3350 to 3354. Remaining in service until the late 1960s, they became the last USA-built Berkshires in the world to remain in revenue-earning common carrier service. New Zealand In 1904, the Wellington and Manawatu Railway Company (WMR) ordered a 2-8-4 tank locomotive from Baldwin Locomotive Works for banking duties on the % (1 in 40) gradients from Wellington to Ngaio. The locomotive, no. 3, was nicknamed Jumbo. When the New Zealand Government purchased the WMR, no. 3 was renumbered to WJ class no. 466 by the New Zealand Government Railways. It was the only locomotive in the class. The locomotive had a tendency for cracking its bar frame on this heavy duty. By 1920, it was waiting to go to the Petone Works with yet another crack in the frame and it did not see much service after that. The solitary 2-8-4T locomotive in New Zealand was written off the books in 1928 and its boiler was sent to the Taumarunui locomotive depot for use as a washout boiler. Norway In the mid-1930s, the Norwegian State Railways (Norges Statsbaner or NSB) ordered altogether eighteen powerful superheated four-cylinder compound 1'D2'-h4v (2-8-4) passenger locomotives for express and passenger train service on its single mainline between Oslo and Trondheim, on the northern section between Otta and Trondheim. The section of the mainline between Trondheim and Dombås reaches an altitude of over the Dovrefjell, with gradients of 1 in 46