7S-007-007 Class 57xx Pannier 9669 BR Black Late CrestThe GWR 5700 Class, or 57xx class, was a class of 0 6 0 pannier tank steam locomotive, built by the Great Western Railway (GWR) and British Railways (BR) between 1929 and 1950. With 863 built, they were the most prolific class of the GWR, and one of the most numerous classes of British steam locomotive. Although officially designated by GWR as "light goods and shunting engines", it soon became clear that other duties could be performed such as branch