100m
Impossible to answer without knowing the model of the rifle.
I just got one for $70, it is missing the front sight. Other than that it looks good.
A powerful bolt action rifle some basic camouflage, patients, and time to sight in the rifle properly.
10-1000 USD or more depending on specifics.
It could be anywhere from $350 to $5500, but assuming a standard sporting rifle, my guide suggests $1600 in NRA Very Good condition.
Should be a Stevens rifle, but the peep sight would probably be aftermarket. If you can send a digital picture of the rifle and a closeup of the sight we can probably ID it for you. sales@countrygunsmith.net
The patent date should be just in from of the bolt under the rear sight. But only if it is a bolt action!!!!
www.e-gunparts.com
I recommend checking online for videos and forums to assist you in setting the sight for your rifle. With each rifle and barrell, it will differ on how the sight is set and someone with more knowledge may be able to assist you.
I would first look to numrich arms in as they specialize in old gun parts.
A Winchester 94AE has a modified ejector that throws the spent case to the right making it easier to mount and use with a telesopic sight. The AE means Angle Eject. These were produced after 1966 in order to compete with the side ejecting Marlin lever action rifles.
Assuming you mean a Mauser 24/47, use the sight as you would any open rifle sight. The slider on the rear sight adjusts for range- marked in meters.