We've not previously seen a 'CJ' barrel mark, nor did any of the known major Smith distributors have those initials
http://www.lcsmith.org/faq/distribute.htmlThere was no 'CJ' in the
Syndicat des Fabricants de Canons de Fusil de la Vesdre in 1907
Some fluid steel barrels by
Charles Clement et L. Neumann Freres were marked 'C.J.C.J.'
You can see examples of the identified Hunter Arms damascus marks here
http://www.picturetrail.com/sfx/album/view/17116222If you acquire the gun, please post an ultra close-up pic of the mark, or send it by jpg attachment to revdoc2@cox.net and thanks!