Send me photos of the rifle and of the markings, and I should be able to narrow it down for you. The email address is in my bio page.
7.92x57mm, better known as 8mm Mauser. Same caliber as the German military's Mausers.
7x57mm
Yes.
I have one and it is a 7x57 caliber is stamped on the left side of the barrel.
It MAY. The "broomhandle" Mauser was originally made for a bottlenecked cartridge, the .30 Mauser. It was later made in caliber 9mm Parabellum.
"No, 7.92 is German military caliber for WW 2 and earlier Mauser rifles." Actually, 7.92x57 is the same thing as the 8MM Mauser, if that's what the person was asking.
The value of a .22 caliber single shot Mauser gun depends on its condition. This gun in mint condition is valued at around 150 dollars as of 2014.
7.65x53, also known as the 7.65 Argentine or Belgian.
Usually the sn and caliber
Impossible to answer without knowing the exact variant and caliber.
20-250 USD or so
You can also get an inside caliper and measure the inside of the barrel. Bore should be .275 in. This is a Mexican Mauser - most of which were 7x57mm.