First, I think you mean register. In MOST of the US, there is no requirement to register ordinary firearms. Now, about the serial number- it is unlawful to REMOVE a serial number, or to possess a gun that has had the SN removed. However, there are guns that do not HAVE a serial number, and they are legal. Rifles and shotguns made prior to 1968 were not required to have serial number. Those guns are listed as NSN- No Serial Number- on paperwork that asks for a serial number.
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.
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.
Gun Registration...
You find a published list of serial numbers for the maker.
Winchester serial numbers were unique to the model of the gun,The only thing the serial number tells you about the gun is it's age.The serial number you've listed was from a gun made in 1974.
Usually not possible. More than one gun can have the same serial number.
Just the serial number is not enough to tell who or what you have.