Yesterday at a militaria show I saw one of the classic trench art brass sword type letter openers for sale. These are often seen with cartridge cases for the handle.
The blade was engraved with “Somme 1916”.
The problem was that the cartridge case used for the handle was a .300 Win Mag.
I have seen a few of these types of items around over the last few years. Obviously there will be a market for fakes with upcoming 100th anniversary of the Armistice next year.