| Caledonian Single No.123 | |
|---|---|
| Caledonian railway no 123 at Glasgow's transport museum. | |
| Power type | Steam |
| Builder | Neilson & Co. |
| Serial number | 3553 |
| Build date | 1886 |
| Total produced | 1 |
| Configuration | 4-2-2 |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver diameter | 7 ft 0 in (2.134 m) |
| Locomotive weight | 41.35 long tons (42.01 t) |
| Boiler pressure | 160 psi (1.10 MPa) |
| Cylinders | Two |
| Cylinder size | 18 × 26 in (457 × 660 mm) |
| Tractive effort | 13,638 lbf (60.7 kN) |
| Career | CR · LMS |
| Power class | 1P |
| Number | CR 123; CR 1123; LMS 14010 |
| Withdrawn | 1935 |
| Disposition | Display, Glasgow Museum of Transport |
Caledonian Railway Single No. 123 is a preserved Scottish steam locomotive. The unique 4-2-2 was built by Neilson and Company in 1886, works No. 3553 as an exhibition locomotive. In 1914 it was placed on the Caledonian Railway duplicate list, and renumbered 1123. It entered London, Midland and Scottish Railway service in 1923 and the LMS renumbered her 14010 and gave her the power classification 1P. She was withdrawn in 1935 and set aside for preservation.
She was restored to steam by British Railways to run Railtours and enthusiast specials until the end of Steam in Scotland.
Tri-Ang released a model of No.123 in the 1960s, in Caledonian livery and labelling. This model shared its chassis with the model of the Dean Single released at the same time, and was powered by its driving wheels and trailing wheels. Following the other styles of modelling at the time, the model was produced up until the 1970s. Later it was revived in the 1980s in LMS Crimson livery, and was subsequently released in a limited-edition pack in its Caledonian colors. In 2007, the locomotive was released in LMS Black livery, with DCC capability being added to allow the locomotive to fit the then current range. A train pack entitled 'The Last Single Wheeler' was introduced in 2010 featuring the locomotive in LMS Crimson livery again, with three LMS carriages of the time.