Hello, thank you both for your comments!
Yes, I'm extremely pleased and happy!
Fabrizio, the "hole" is only under the stone.
I did not post a picture of the front of the scabbard without the puch, but there is one in the original ebay listing.
I'm not able to figure out what was the reason for this "hole".
It can't be for weight reduction, as the portion of the plastic removed is too small.
Also, why making this quite elaborate design?
I can only think that the stone was probably not supposed (in the beginning) to be glued to the scabbard, but attached in a different way....