The Graham Farish N Gauge No. 1841 Class 4F (0-6-0) Tender Loco LMS 4143 is a pre-built model replica of a London, Midland and Scottish Railway locomotive from Era 3. Manufactured in 2000 by Graham Farish in the United Kingdom, this 1:148 scale model captures the essence of transportation during the Big Four era, making it a valuable addition to any model railway collection.