I agree that this Khyber knife could have been nailed to the wall, since there are so many of you, supporters of this idea, and Ariel is with you )
Only the secondary use of the blade is really not uncommon.
In two photos from oriental-arms, the drawings around the holes show that they were made on a hot blade during its manufacture (thanks to the eagle eye of RenRen
).
And it is unlikely that anyone raised a hand to nail it to the wall of the bar with two nails.
And on a seriously resharpening, reformatted blade it is useless to try to understand whether there was a hole in the center.