these bayonets were manufactured at - and stamped - "Artilleria F-Nacionale Toledo" as is this one. The hilt construction is steel, with steel "bird's head" pommel, steel crossguard with muzzle-ring, and - as mentioned before - checkered-wood grips.
The blade is single-edged, single-fullered (both sides) with manufacturer's stamp on one side of the ricasso, serial number on the opposite.

According to "Janzen's Notebook," this bayonet was also used by Mexico (and very possibly Portugal).

This long bayonet was for use on the Spanish Mauser "Short" Infantry Rifle, whereas the short bayonet was for use on the standard Spanish contract "Long" Mauser Infantry Rifle; such was the thinking of the times: short rifle, long bayonet; long rifle, short bayonet. This kept the thrusting distance the same.