No published sn data that I know of.
Break open the action and it should be engraved on the metal that is normally unseen when the action is close, that or it should be on the barrel. If the chokes are removable then it should be engraved on those as well.
Unknown.
The model number is usually engraved on the barrel .
The model number is usually engraved on the barrel .
Requires professional appraisal
read the information engraved on top or side of barrel
100yrs give or take
It depends on the model, and a lot of prewar 22's don't have serial numbers at all.If you repost he question with a detailed description of the gun, I can give you a ball park guess.Write down all the information engraved into the barrel and action, how long the barrel is and any unusual features.
The lands and grooves in the barrel that impart spin to the projectile
50-5000 usd
Is the crate and barrel a public company?
Half barrel is not a type of firearm action.