Interesting is that the rivet used to fit the lanyard here is the same as the type that is used to fit the leather strap to a Swiss bayonet scabbard.
It is not a common rivet anymore (the diameter and the black paint) and it took me long to find some of these for restoring old scabbards.
Most of the Luger lanyards were fitted by stitching.
Thanks,
Guisan.