Here is my Neca limited edition V For Vendetta Dagger. Numbered 1396/1500.
Available since 2011. This full-size dagger prop replica from V for Vendetta is displayed in a 18" shadow box display with name plaque. This resin piece is limited to 1500 pieces worldwide.
There are wall mounting brackets on the back as you can see here.
There is wooden panel that slides out, would have been better as perspex or glass perhaps.
Here is one of my replica V For Vendetta Daggers.
Available on Amazon fairly cheap, it is simply called "Vendetta Dagger" and is Stainless steel with a non sharp blade