Nice article. G&H has a nice pair of 1950s era Burys Theyve been peddling for a bit. It is on their new guns page and unfortunately wont hyperlink directly. Click over and look at them, they are stunning.
They are selling them new as they were brought from the maker and have not been used.
I would love to know when they were all proofed as at least one 16 was proofed in the 1960s which makes the story all were untouched since WWII not exactly right.
As others have stated before the article in Shooting Sportsman do not mention the 16ga Guns, but enough people saw them to be sure of their origins.