This is very cool. Lawrence of Arabia's pocket knife.
Looks like a solid and practical knife, so no wonder he went with such a model. The hook was used often back in the day for buttons, loops and such. Notice the very nice scissors for delicate cutting tasts. There's one tool in the grip, looks like the tweezers found in modern Victorinox knives. It could be that or it could be some kind of metal pin or toothpick.