The DAPOL 4567 ND-020 N gauge 57xx Pannier tank Shirtbutton (Loc 4) is a replica of a British Railways steam era pannier tank from Era 4. Made of plastic and controlled by an analogue system, this model is a collectable piece perfect for railway enthusiasts. Manufactured in the United Kingdom by Graham Farish, this shirtbutton is a detailed and accurate representation of a classic steam locomotive.