This locomotive is a modified reproduction of Meccano's 4-4-0 Passenger Locomotive and Tender (Model No. 10.12) from 1971. It's typical of a type of steam locomotive that was popular in Great Britain in the early 1900s for hauling fast passenger trains. The passenger carriage is based on a British Railways Mark 1 coach and was modeled based on photographs from the web and overall dimensions obtained from an old BR publication. The loco and tender model is about 50 inches long and includes an electric motor, gearing, and chain to drive the main wheels and linkage. The passenger carriage is about 51 inches long.