I own an 1891 Argentine Mauser that resembles the Mauser in the picture. A good shooter. Damned accurate.
I have it cleaned and “retired” since ammo is hard to find and I have other good shooters...
I’ve got a cherry later mauser model 1909 Argentine. Longer barrel than a regular Mauser but a very NICE rifle.
You’re right though, the 7.65 ammo is not really easy to find whenever you want it.