Saw a very similar WW1 No1 a few years back in a traveling display for ANZAC day. It had been struck by a shell fragment. The note went on to say it was cocked and had nine rounds in the magazine. I asked if anyone had confirmed it wasn't loaded. Came back the next day with a camera to discover it had been removed- it had been loaded and was picked up by an explosive ord. disposal team....
I wonder if that one still has a round up the spout?