Below is another thread on Ferdinand Claudin Paris but the Leopold Bernard tubeset number isn't given.

The gun seen above is a 16bore SxS, was done by Ferdinand Claudin of Paris, over 1859-60, with hot-proof Bernard damascus tubes (has his maker's marks and proof numbers), and really nice piece of wood. The darkness shows up all over the gun.







http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=148288&page=5