Contact the maker.
No published sn data.
No way to answer. Must have the name of the maker
It is impossible to answer without knowing who the maker is.
The gun maker never sees a customer. Guns are sold to individuals not by the maker, but by a gun dealer. No, it is not the dealer's responsibility to ask a person what they are going to do with a gun.
Maker or manufacturer.
Your question can't be answered as written. Provide the name of the maker and maybe it can be.
Go to the maker's web site and see if they have sn data.
Impossible to answer without the name of the maker. Even then, there might not be published sn data.
Impossible to answer without the maker's name.
Contact the maker.
Find out who the maker of the gun is and see if they can help you with the model name and number. If this is an old gun and the maker is no longer in business check with a professional appraiser. The number by itself does not mean much.