Your 1892 model was commonly called the Lebel or Mod�¨le d'Ordonnance and was the first revolver of swingout cylinder design adopted in Europe. It was produced until 1950, succeeding the most popular revolver in the world of its time, the indestructible M1873 "B�¢tisseur dâ??Empires" 12x15.5R blackpowder solid frame of a Chamelot-Delvigne design, best known today for playing supporting parts in The Mummy. If fires the smokeless 8 mm French M.1892 cartridge, also known as 8x27R Mod�¨le 92 Fran�§ais "R�©glementaire", 7.7 mm Clair, 8 mm Franz�¶sischer Ordonnanz Revolver M.1892, 8 mm Lebel Revolver, 8 mm R�©glementaire M.1892, 8 mm Revolver M.1892, 8.3x27.5 Lebel Revolver, DWM 525 594, GR 662, SAA 3830, or EB 092. It propels a 7.2 gram bullet to the velocity of 259 meters per second and energy of 241 joules at the muzzle, ballistically comparable to .38S&W. The ammunition is unobtainable, but reportedly may be formed from .32-20 cases.
http://www.rayrilingarmsbooks.com/cg....cgi/1675.html
http://oldarsenal.com/French%20M.%201892%20Revolver.htm
http://www.secondeguerre.net/Armes/revolverlebel.htm