The typical Caledonian or Glasgow & South Western Railway signal consisted of a lower quadrant arm on a lattice post, with a ball and spike finial and round-case lamp, all supplied by Stevens & Co. Post-Grouping, the LMS modernised many of these signals by replacing the arm with the upper quadrant Westinghouse type. A D-shaped case Adlake lamp was also fitted at the same time. Some examples may still be in use on Network Rail today.

The kit can be built as a home or distant signal in any height up to 27ft. An alternative finial is supplied to represent the open ball and spike pattern used on later GSWR signals, and by modifying the finial, the kit is also suitable for modernised Furness Railway signals.

The kit is designed for soldered construction, but Araldite or superglue can be used in places, particularly if the finished signal is not intended to operate. Some simple marking out, cutting and shaping of parts is required. To see exactly what is involved in constructing this kit, download the instruction sheet as an Adobe Acrobat® file (115kb).