In the very early 70's we were inspecting, re-wire-wrapping and returning to Ordnance a whole load of War Reserve No1 rifles. I explained all this in an article some time ago. We only had one cup to use to test them but if they HAD the cups in War Reserve, we didn't see them! I seem to recall that they had a dark green/khaki band on the butt and fore-end to show that they were fit to fire with the letters EY in yellow on the butt.