Sorry- impossible to answer. A serial number is not unique to only one gun in the world, or it would be a VERY long number.
Yes, as long as he knows the serial number.
You can't value anything with just a serial number. Who made it? What condition is it in? Is it a hand gun or a long gun?
Yes it is illegal to own a gun that does not have a serial number. It is also illegal to remove the serial number off a gun.
We have no way of telling, since we have no idea what gun you have. You seem to be under the impression that a serial number is unique to only one gun in the world. They are not- or the serial number would be at least 15 digits long.
In most cases, if you give me only a serial number, and no info on make, model, caliber, then no. A serial number is not unque, or it would be 20 numbers long.
With just the serial number, nothing.
It would be almost impossible to identify a gun just by its serial number.
Just by the serial number, no.
Impossible to answer. A serial number is not unique to only one gun in the world.
Impossible to date a gun with just the serial number and no other informaiton.
The serial number is on the frame.