急行用機関車として誕生した01形（2気筒）を元に3気筒で製造されたシリーズ。ナンバーは1102とあるが、千単位の数字は0110形を意味し、車両番号は102号機となる。

This series is based on the 01 class (two-cylinder) locomotive, which was created as an express locomotive and was manufactured with three cylinders. The number of the locomotive is 1102, but the number in thousands means the 0110 class, and the car number is 102.