Sentetsu Tehoni-class locomotive
class of 21 Korean 4-6-0 steam locomotives

The Tehoni-class (テホニ) locomotives were a class of steam tender locomotives of the Chosen Government Railway (Sentetsu) with 4-6-0 wheel arrangement. The "Teho" name came from the American naming system for steam locomotives, under which locomotives with 4-6-0 wheel arrangement were called "Ten Wheeler".
After the Liberation of Korea, of the 178 surviving locomotives of all Teho classes - including six previously owned by private railway companies - 106 went to the Korean National Railroad in the South, and 72 to the Korean State Railway in the North.
Description
The テホニ (Tehoni) class was a class of single-cylinder 4-6-0 locomotives for mainline use built by the Baldwin Locomotive Works and the Brooks Locomotive Works of the United States between 1906 and 1909, originally for the Gyeongbu Railway, and later operated by the Chosen Government Railway. Like all Teho-type locomotives operated by Sentetsu, they had driving wheels of 1,680 mm (66 in) and a top speed of 95 km/h (59 mph).
Gyeongbu Railway 200 series
Needing more locomotives for medium-duty passenger operations on both main and branchlines, the Gyeongbu Railway once again turned to Baldwin of the United States, ordering a total of twelve 4-6-0 tender locomotives in 1906. Six of these were six were single-cylinder locomotives and the other six were two-cylinder Vauclain compounds which were delivered in knockdown form and assembled at the railway's shops in Busan. Numbered 201–206, they were not long in operation with the Gyeongbu Railway, as the company was nationalised in July 1906 and folded into the newly formed National Railway, which became Sentetsu in 1910, in September of that year.
Chosen Government Railway テホニ (Tehoni) class
After being taken over by Sentetsu, another nine were delivered from Baldwin in 1908, followed by a further six from Brooks in 1909. They were put to use on mainline passenger trains, but as more powerful types were introduced, they were gradually relegated to branchline duties and freight trains.
“Sentetsu Tehoni-class locomotive” enters the record as class of 21 Korean 4-6-0 steam locomotives. Crown Archives preserves that source wording while asking what Sentetsu, Tehoni-class and locomotive can confirm, complicate or overturn.
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