Certainly caught my attention.
Only info I can find I can't read the language.
But I gather it's a straight pull bolt action. Box feed mag angled out the right side at about 2 oclock.

Here's link w/ copy of a magazine article done on the rifle & inventor. Some good pics, drawings, ect.
https://www.taringa.net/comunidades/armados/9059086/Rifle-Argentino-Chiesanova-1895-1900.html