Could it be a Martini-Henry M1871 bayonet? The Ottomans were armed with this model during the Russo-Turkish War of 1877-78. I could not find a good picture of this bayonet and hopefully DD can help. What I can say with certainty is that it is neither a Chassepot, nor a Snider bayonet, nor a bayonet for the 1874 Martini-Peabody rifle.
|