Dubs Crane Engine

Dubs crane tank No. 4101 is an 0-4-0T crane locomotive manufactured by Dübs & Co. in 1901, Glasgow for the Shelton Iron and Steel Works, Stoke on Trent. A "crane tank" is a type of steam locomotive upon which a steam-powered crane is mounted, producing a machine which is capable of performing as both a shunter and a mobile crane.