France, III Republic. An M1866/1870 French Saber Bayonet, by the Manufacturer of Arms of Saint-Étienne
This bayonet features a 572 mm long steel blade, magnetic, incorporating a semi-sharp blade and a very sharp tip, the fuller running three-quarters of the length of the bayonet on both sides, engraved in running script "Mre d'Armes de St. Etienne" (Manufacturer of Weapons of Saint-Étienne) and "Mai 1870" (May 1870) on the wide spine, marked with an distinguishable mark on the obverse ricasso, maker marked with a "B" inside an oval frame and beside an "M" surmounted by what appears to be a star on the reverse ricasso. The blade is embedded into the heavy steel crossguard that is designed with an upward-facing hooked quillon, marked where it butts the blade with a script "A" beside"19086" above the code "M10", along with a few faded and/or indistinguishable marks on the hooked portion, marked along the top edge with what appears to be an omega or "G" beside what possibly is crossed swords, the other end with a ring for placement upon the barrel of a rifle, the handle in brass with a multi-ribbed grip on both sides, incorporating two rivets, the pommel with knob and mortise slot to receive the rifle, the bayonet measuring 697 mm in length overall. The blade exhibits scratches overall, common to extraction and return to the scabbard, surface rust and wear present on the crossguard, contact marks on the handle. Near fine.

