[Evgeny_K]

Originally Posted by rickystl

As I think further on this, you are probably right.
Rick.

Around the early 1600s, the technique had spread to the Ottoman Empire and later to Hungary and Spain by the 1650s. The defeat of the Turks in the Siege of Vienna in 1683 yielded thousands of captured pattern welded barrels for examination, and this event accelerated the manufacture of pattern welded barrels in Europe. By 1700, the Belgians were producing pattern welded barrels in Liege, and in the early 1800s, the technique was used in England to produce high quality sporting barrels.

http://firearmshistory.blogspot.ru/2...welded-or.html