Did a google search. Here's a link with some info. Indeed the Argentine military utilized the Mauser and like the name says, the pattern 1891 Mauser. It looks like the 1891 Mauser rifle was used almost exclusively by Argentia. It's an interesting bayo. You'll see that there's a specific pattern for the Navy- to address marine conditions. I've never been exposed to this type bayo so it was a good learning experience during some of the lite research.
There's alot of info out there from a simple google search. Just a matter of going through the various pages. The link is below:
Modelo Argentino 1891 Mauser Sword Bayonet