My latest addition! Not overly inspiring at a first glance and maybe something you would expect to find in a potting shed, but it Isn't! It must be fairly scarce as I haven't seen another one but if you look closely it is stamped Y.D.B. 1941 (anyone know who they are?) and stencilled ISAA (Inspectorate of Small Arms Ammunition)These boxes collected filled rounds from the filling machines at ordnance factories before they were packed in a H1, H13 or similar. From photographs I have seen they were the same design as those used in WW1.