Another Darne ten gauge, that is. Have had communication with a Cannuck that reports a 10 gauge V17 is on it's way to him.
His photos he shared show a case colored, fully engraved large key action in perhaps 99% condition. From what I could see.
So, the world is up to about 5, including a certain 12 that has been refitted to 10 gauge, an R10 in New Mexico, an R17 magnum residing in the United Kingdom, and the photo of a black oxide finished 10 that appeared in the 1973 "Gun Digest" article by John T. Amber.
Neither of the Bruchets, father or son, had ever seen a Darne 10 when I was there, circa 1997, and long term actioner Pierre (employed since the 1950s) hadn't seen one, either.
Some things are rare. A Darne 10 is one of those things.
Best,
Ted