CR 323 Class

The Caledonian Railway 323 Class was a series of inside-cylinder 0-6-0 goods locomotives designed by Dugald Drummond and built at St Rollox Works, Glasgow, from 1887. They formed part of the extensive programme of goods engine construction that Drummond carried out during his tenure as Locomotive Superintendent of the Caledonian Railway between 1882 and 1890, providing standardised, capable motive power for the CR's heavy coal, mineral, and general goods traffic across central Scotland and the West Coast main line.

The 323 Class continued Drummond's established CR goods engine practice: inside cylinders for ease of maintenance, a parallel boiler, 5 ft coupled wheels appropriate for goods work, and Westinghouse air brakes — the latter a consistent feature of all Drummond's Caledonian designs and one that gave the CR a reliable continuous brake system ahead of the 1889 Regulation of Railways Act that mandated it. The class was built alongside the contemporaneous 262 and 264 classes as part of Drummond's systematic standardisation of CR goods motive power.

The 323 Class worked Caledonian goods traffic from 1887 until withdrawal, which occurred progressively through the LMS era after the 1923 Grouping. None was preserved.