The Tehoshi-class (テホシ) 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 Following the brief excursion to ALCo for the Tehosa class, Sentetsu once again returned to Baldwin for the next order of 4-6-0s. This was a small lot of four locomotives built in 1913, initially numbered 235–238 and intended for local freight trains, and had a lower profile than the previous Baldwin designs. They were renumbered 661–664 in 1918, finally being designated テホシ (Tehoshi) class in the 1938 general renumbering, numbered テホシ1 through テホシ4.
Postwar
Korean State Railway 더우너 (Tŏunŏ) class All four locomotives of the class went to the North after the partition, where they were designated 더우너 (Tŏunŏ) class by the Korean State Railway and numbered 더우너1 through 더우너4, but little is known of their service lives and subsequent fates.
Construction Sentetsu running number Postwar 1914–1918 1918–1938 1938–1945 Owner Number Builder Year Notes 235 テホ661 テホシ1 KSR 더우너1 ALCo 1913 236 テホ662 テホシ2 KSR 더우너2 ALCo 1913 237 テホ663 テホシ3 KSR 더우너3 ALCo 1913 238 テホ664 テホシ4 KSR 더우너4 ALCo 1913 Total 4
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