Stylet misericordia with two quillons and checkered grip. Renaissance cold weapon with very pointed square blade. Dagger used to give the deathblow to the opponent fallen on the ground. Its sharpness allowed to introduce it easily between parts of the armor, unless the opponent implored mercy which gave the name to this arm! XVIth century militaria.
Really good condition
"Armes occidentales", Princess editions, Paris, 1976, pages 68 and 141, photography 41.