Patented in 1896, this is one of several models of unique pocket pistols designed by Paul Brun-Latrige. He was a manager of the Manufrance company located in St. Etienne France, a large mail-order catalog company that produced a wide variety of products. Early versions of this pistol used a ring trigger mechanism and a 5mm cartridge, while this one uses a folding trigger and is chambered for an 8mm round (the same ammunition used in Manufrance's Gaulois palm pistols, I suspect).