mauser
The top one is interesting in that after consulting my Mauser book, notice the bayonet lug, and how it has that step down piece like it was added on after.
My book shows that same bayo lug on Japanease captured VZ-24's.The Japanease captured enough VZ-24's from China that they equiped five divisions with them, the bayonet lug was modified just like yours to fit the Jap bayo.
The China contract for VZ-24 all have 1937 on the reciever as that was the supply year. But your crest is not Czech?
Maybe the spanish used the same bayo, although I doubt it. So who knows what that lug piece is for?