Third Patt, F.S, knife, not military issue, nice knife though.
Made by Reg Cooper I think
World Knives: Reg Cooper Sykes Fairbairn British Dagger - SRCSFD
Thanks for the comments guys, I think you are right Richie
Looks like it has the very common (on FS daggers) missing point/tip But they are nice looking knives. They should have a tendency to "roll" in the hand when in use. Aka, stabbing something. The four flat grinded sides of the blade, gives it a strong as possible spine and tip, and also reduces weight.
Hi Lars, it does indeed have the tip missing sadly.
You could have a pro knife maker remake it. It's a difficult task though, because he will have grind off material on all four flat grind surfaces without removing too much or any of the spine itself. You can not do it only by edge grinding. Sorry if my tech terms is not absolutely correct.