The model trains are hand built, to represent individual locomotives, carriages, and wagons as exactly possible, based on surviving records and photographs. Operation consists of a sequence of trains, showing what one could have seen passing by on a summer day and night, in the mid-1920s. This sequence is based on timetables of the period. They are all modelled in 4 mm to 1 foot scale (1:76), and run on track of 18mm gauge, a combination known as EM gauge.