Vintage/Antique W.W. II Mexico Fundicion de Artilleria Knife and Sheath

This knife was left to me in an estate along with tons of other old knives, antique swords and guns. I'm going to post some of the swords here soon. I think the sheath is correct for this kinfe. I'm not sure of the age, I have read these are from W. W. II, but some say they are older. The old man who owned all this was an avid collector of everything, it was amazing going through it all.