Unknown.
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.
There is no way anyone can answer this question. That serial number could appear on hundreds of guns.
The first two numbers of the given serial number indicate the year the gun was manufactured. In this case, the gun was made in 1973.
You can't. The same serial number can appear on guns from different manufacturers and on different models from the same manufacturer.
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 date a gun with just the serial number and no other informaiton.
Impossible to answer. A serial number is not unique to only one gun in the world.
The serial number is on the frame.
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.
Gun Registration...