Mr. Carney wrote an article that appeared in The Double Gun Journal, that included three sliding breech guns, including the 10 gauge. Perhaps he can remind us of the issue and year, my collection is not close at hand.

I remember some of the things he went through to get the 10 gauge right, including some sub standard work in France. A pity they couldnt get it right the first time, and an indication as to why there is no longer an importer to the US.

A 10 gauge Darne is indeed, a rare gun. Fransisque Darne also teased about a version of their gun being available in 10 gauge circa 1936, and I would really love to find one by either maker.

Best,
Ted