I saw a very similar rifle to yours last year at the Chilliwack two day, spring show.
It had a price tag on it for $1200
I don't believe it sold.
I was interested and looked it over for condition. The bore was shiny, with barely visible frosting, and some throat wear. Maybe 85%.
The wood had been cut back further than your rifle and the front band was not there.
The rear sight was intact. The rifle was restorable, as is yours.
That rifle is an oddity, which has a niche love circle.
I remember when I first noticed them. I was on a buying trip in the US and they were all over local gun shop shelves from Montana to Florida, Texas, California and Washington.
They were available in two versions, long rifles and carbines.
Most were ridden hard and put away wet. Well worn, with pitted/worn bores, dented/cracked stocks, and sometimes nonfunctioning internals. They were never cheap.
Many were bought up to be "customized"
I saw a huge pile of them in Mexico in 1967, on a Mexican government warehouse parking lot. They were being loaded onto dump trucks, to be taken to a place where they were stripped of all wood and the metal went into scrap bins. There were people there, purchasing bins. What they did with them I don't know.
I've owned a couple of them over the years, all of them have "large chambers" and may or may not be suitable for factory loaded ammo.
I hand loaded for the rifles I had, 175 grain bullets over a minimum suggested charge. Never had an issue.
I don't believe the Mexicans or whomever else issued them made up special ammunition for them. Likely felt they were safe for the other 7x57 rifle types they issued, such as 91,93, and 95 Mausers.