Using high quality damascus barrels made in Belgium
From http://heuse.spahistoire.info/henriheuse.html

I calculated our business since the year 1890 and I noted that we had bought franks for the sum of 2.150.000 dollars which we paid in Lochet, to my uncle (Henri Heuse) and with Plunger-Riga wire. I did not calculate the franks which we received for this sum (according to theCommunal one of Brussels, this sum corresponds to 2.305.616.614 franks in 1993)... the Colt fire Arms Co of Hartford Con bought the Damas most expensive like crollés and the Turkish Damas with six blades. When the Germans destroyed the manufacture of the Damas guns, that was a calamity for Nessonvaux. My dad is the man who bought the most Damas guns, he sold some more, all alone, which all others together. They are Riga which put the Damas gun forces some here...

https://sites.google.com/a/damascusknowledge.com/www/home