The 'Crimes Hearts and Coronets' article says the silencer was destroyed in 1996.
But will be happy to be shown other sources.
Well Adam, you know what these articles are like, don't you? A little bit of literary licence helps to spice up the mundane and if they get the odd fact wrong, so what? Not enough sue for it to be that much of a problem.
I've noticed that one of your irritating traits is asking the same questions ad nauseum. Another is asking for sources to be found for you. As this makes me wonder if you suffer with memory problems, I think it would serve more beneficial purpose for you to find for yourself, the source of those things you dispute, that was you'll be more likely to retain the answer and less likely to repeat the questions.