Hello, It is my first post here and I need your help in identifying our latest metal detecting find. It's a small iron cast plate with G.W.R. Swindon on it. I have attached front and back pictures. We found this on a small field in Burnham near Slough, Berkshire. Any information is much appreciated. I am interested in the history of this item and maybe some insight as to how it ended up so far away from Swindon or any rail network for that matter.