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Originally Posted by Argo44
Second to last gun, French box lock by Gaute made for a Bordeaux Armurier with "Wonder" barrels.

[Linked Image from jpgbox.com]

I own a French "Wonder" gun, made in Saint-Etienne. Per FAB the trademark was Parisian:
https://doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=481671&page=6

an interesting marking i don't believe i've ever seen before - EPREUVE SUPERIEURE - you can see the two stamps from the st. etienne house, but it is not marked "double epreuve". so this gun can be dated (?) in that period when there was the option for a "reinforced" proof that was not "double proof" - but was marked with two stamps? as per wirnsberger/steinler - 30 july 1897 until 18 december 1923?

"it's a poor sort of memory that only works backwards."
lewis carroll, Alice in Wonderland