Etched Brass Kit. F16-F18 were built by Brown Marshall and F24-F25 were built by their successors Metropolitan. They followed FI3-F14 with tumblehome to the bodyside but reverted to the Guard/Third layout. F18 is still in service. F25 and F26 await restoration, while F21 is at Cavan in Eire, condition unknown. 4 axles 9mm dia wheels & couplings needed to complete.