Normally Belgium barrels on shotguns were brazed full length, while British guns were soft soldered.

Scraping the rib.barrel joint under the forend was a common method to check whether it was British or Belgium made when the stamped names used were sometimes fraudulently duplicated or fairly closely approximated in the 1800's and early 1900's to put off Belgium guns as being British made.

Even in 1850, W.Greener spoke of this in a SanFransisco newspaper. W.W.Greener was still speaking of it in 1911's, 9th edition of "The Gun and it's Development".